Method of applying staples in lower anterior bowel resection

ABSTRACT

A method for manipulating tissue of a patient includes a surgical instrument having a handle assembly, a shaft assembly, and an end effector. The method includes positioning a tissue within a gap between a cartridge and an anvil and against a guide pin to laterally position the tissue relative to the cartridge and the anvil. The method also includes moving a retaining pin from an open position to a closed position to capture the tissue and moving the cartridge toward the anvil in a closed configuration. Furthermore, the method includes inhibiting deflection of a distal end portion of the end effector wherein at least at least one of the guide pin or the retaining pin connects to the distal end portion. The method further includes forming a plurality of staples within the tissue and cutting the tissue with a knife.

BACKGROUND

Some surgical staplers are operable to clamp down on one or more layersof patient tissue, form staples through the layers of tissue tosubstantially seal the layers of tissue together near the formedstaples, and cut through the layers of tissue for forming severed endsof operatively sealed tissue. An exemplary stapling instrument mayinclude a pair of cooperating elongate jaw members, where each jawmember may be adapted to be inserted into a patient and positionedrelative to tissue that is to be stapled and/or incised. One of the jawmembers may support a staple cartridge with at least two laterallyspaced rows of staples contained therein, and the other jaw member maysupport an anvil with staple-forming pockets aligned with the rows ofstaples in the staple cartridge. Generally, the stapling instrument mayfurther include a pusher bar and a knife blade that are slidablerelative to the jaw members to sequentially or simultaneously eject thestaples from the staple cartridge via camming surfaces on the pusher barand/or camming surfaces on a wedge sled that is pushed by the pusherbar. The camming surfaces may be configured to activate one or morestaple drivers carried by the cartridge and associated with the staplesin order to push the staples against the anvil and form laterally spacedrows of deformed staples in the tissue gripped between the jaw members.Such rows may be arranged as linear rows and/or arcuate rows forsequentially or simultaneously stapling and cutting the tissue of thepatient in the form of a predetermined pattern. The knife blade maytrail the camming surfaces and cut the tissue along a linear or arcuateline between the rows of staples formed in the tissue.

Merely exemplary surgical staplers are disclosed in U.S. Pat. No.6,988,650, entitled “Retaining Pin Lever Advancement Mechanism for aCurved Cutter Stapler,” issued Jan. 24, 2006; U.S. Pat. No. 7,134,587,entitled “Knife Retraction Arm for a Curved Cutter Stapler,” issued Nov.4, 2006; U.S. Pat. No. 7,147,139, entitled “Closure Plate Lockout for aCurved Cutter Stapler,” issued Dec. 12, 2006, U.S. Pat. No. 7,147,140,entitled “Cartridge Retainer for a Curved Cutter Stapler,” issued Dec.12, 2006; U.S. Pat. No. 7,204,404, entitled “Slotted Pins Guiding Knifein a Curved Cutter Stapler,” issued Apr. 17, 2007; and U.S. Pat. No.7,207,472, entitled “Cartridge with Locking Knife for a Curved CutterStapler,” issued Apr. 24, 2007. The disclosure of each of theabove-cited U.S. Patents is incorporated by reference herein. Additionalmerely exemplary surgical staplers are disclosed in U.S. Pat. Pub. No.2005/0139636, entitled “Replaceable Cartridge Module for a SurgicalStapling and Cutting Instrument,” published on Jun. 30, 2005; U.S. Pat.Pub. No. 2005/0143759, entitled “Curved Cutter Stapler Shaped for MalePelvis,” published on Jun. 30, 2005; and U.S. Pat. Pub. No.2005/0145672, entitled “Curved Cutter Stapler with Aligned TissueRetention Feature,” published on Jul. 7, 2005. The disclosure of each ofthe above-cited U.S. Patent Publications is incorporated by referenceherein.

A surgical stapler may be inserted into a patient to perform colorectalsurgery. Such procedures may include the use of the stapler tooperatively seal, sever, and remove the colon of the patient, in wholeor in part. For instance, a proctocolectomy may be performed during alower anterior resection (“LAR”) for treating and inhibiting the spreadof colorectal cancer cells. Of course, surgical staplers may be used invarious other settings and procedures.

While various kinds of surgical stapling instruments and associatedcomponents have been made and used, it is believed that no one prior tothe inventor(s) has made or used the invention described in the appendedclaims.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of this specification, illustrate embodiments of the invention,and, together with the general description of the invention given above,and the detailed description of the embodiments given below, serve toexplain the principles of the present invention.

FIG. 1A depicts a right front perspective view of an exemplary surgicalstapling instrument with a pin actuation mechanism in an open positionand a staple cartridge in open position;

FIG. 1B depicts a right front perspective view of the surgical staplinginstrument of FIG. 1A with the pin actuation mechanism in a closedposition and the staple cartridge in the open position;

FIG. 1C depicts a right front perspective view of the surgical staplinginstrument of FIG. 1A with the pin actuation mechanism in the closedposition and the staple cartridge in a closed position via actuation ofa closure mechanism;

FIG. 1D depicts a right front perspective view of the surgical staplinginstrument of FIG. 1A with the pin actuation mechanism and the staplecartridge in the closed positions and a firing trigger in a firedposition for stapling and cutting tissue of a patient;

FIG. 2A depicts a right side view of a handle assembly of the surgicalstapling instrument of FIG. 1A, with various components removed forclarity, and with the pin actuation mechanism in a closed position andthe staple cartridge in the open position;

FIG. 2B depicts a right side view of the handle assembly of the surgicalstapling instrument of FIG. 1A, with various components removed forclarity, and with the pin actuation mechanism in the closed position andthe staple cartridge in the closed position via actuation of the closuremechanism;

FIG. 2C depicts a right side view of the handle assembly of the surgicalstapling instrument of FIG. 1A, with various components removed forclarity, and with the pin actuation mechanism and the staple cartridgein the closed positions and the firing trigger in the fired position forstapling and cutting tissue of a patient;

FIG. 3 depicts a partially exploded right front perspective view of thesurgical stapling instrument of FIG. 1A showing the staple cartridgeremoved from a remainder of an end effector;

FIG. 4 depicts a right front perspective view of the staple cartridge ofFIG. 3;

FIG. 5 depicts a rear perspective view of the staple cartridge of FIG.3;

FIG. 6 depicts an exploded rear perspective view of the staple cartridgeof FIG. 3;

FIG. 7A depicts a left side view of the end effector of FIG. 1A withvarious components removed for clarity;

FIG. 7B depicts a left side view of the end effector of FIG. 1A withvarious components removed for clarity, and with the pin actuationmechanism in a closed position and the staple cartridge in the openposition;

FIG. 7C depicts a left side view of the end effector of FIG. 1A withvarious components removed for clarity, and with the pin actuationmechanism in the closed position and the staple cartridge in the closedposition via actuation of the closure mechanism;

FIG. 7D depicts a left side view of the end effector of FIG. 1A withvarious components removed for clarity, and with the pin actuationmechanism and the staple cartridge in the closed positions and thefiring trigger in the fired position for stapling and cutting tissue ofa patient;

FIG. 8 depicts a cross-sectional view of the end effector of FIG. 7D,taken along section line 8-8 of FIG. 7D;

FIG. 9 depicts an enlarged cross-sectional view of a portion of the endeffector of FIG. 8;

FIG. 10A depicts a left side view of the end effector of FIG. 1A, withvarious components removed for clarity, with the staple cartridgereturned to the open position after actuating the firing trigger;

FIG. 10B depicts a left side view of the end effector of FIG. 1A, withvarious components removed for clarity, with the staple cartridgeremoved from the remainder of the end effector;

FIG. 11 depicts a right perspective view of another exemplary surgicalstapling instrument;

FIG. 12 depicts a right side view of the surgical stapling instrument ofFIG. 11;

FIG. 13 depicts a right side view of a handle assembly of the surgicalstapling instrument of FIG. 12, with various components removed forclarity;

FIG. 14 depicts a cross-sectional end view of another exemplary surgicalstapling instrument;

FIG. 15 depicts a cross-sectional end view of another exemplary surgicalstapling instrument;

FIG. 16 depicts a right front sectional perspective view of a portion ofthe shaft assembly of the surgical stapling instrument of FIG. 15;

FIG. 17 depicts a partially exploded left front perspective view of ahandle assembly of the surgical stapling instrument of FIG. 11, with aleft shroud portion and a right shroud portion separated from othercomponents of the handle assembly;

FIG. 18 depicts a left side view of a left shroud portion of the handleassembly of FIG. 17;

FIG. 19 depicts a right side view of a right shroud portion of thehandle assembly of FIG. 17;

FIG. 20. depicts a left front perspective view of a translationalfeedback generator of the handle assembly of FIG. 17;

FIG. 21 depicts an exploded left front perspective view of thetranslational feedback generator of FIG. 20;

FIG. 22 depicts a left side view of the handle assembly of FIG. 17 withvarious components removed for clarity;

FIG. 23A depicts an enlarged left side view of the handle assembly ofFIG. 17, with the translational feedback generator in an unfiredposition;

FIG. 23B depicts an enlarged left side view of the handle assembly ofFIG. 17, with a firing bar moving from the unfired position toward afired position;

FIG. 23C depicts an enlarged left side view of the handle assembly ofFIG. 17, with the translational feedback generator in a fired position;

FIG. 24A depicts an enlarged side view of an indicia window of thehandle assembly of FIG. 17, with the translational feedback generator inthe unfired position;

FIG. 24B depicts an enlarged side view of an indicia window of thehandle assembly of FIG. 17, with the translational feedback generatormoving toward the fired position;

FIG. 24C depicts an enlarged side view of an indicia window of thehandle assembly of FIG. 17, with the translational feedback generator inthe fired position;

FIG. 25 depicts a partially exploded right front perspective view of athird exemplary handle assembly having a visual feedback generator andan audible feedback generator;

FIG. 26 depicts a left side view of a left shroud portion of the handleassembly of FIG. 25;

FIG. 27A depicts an enlarged right side view of the audible feedbackgenerator of the handle assembly of FIG. 25, with various componentsremoved for clarity, and with the audible feedback generator in anunfired position;

FIG. 27B depicts an enlarged right side view of the audible feedbackgenerator of the handle assembly of FIG. 25, with various componentsremoved for clarity, and with the audible feedback generator movingtoward the fired position;

FIG. 27C depicts an enlarged right side view of the audible feedbackgenerator of the handle assembly of FIG. 25, with various componentsremoved for clarity, and with the audible feedback generator movingfurther toward the fired position;

FIG. 27D depicts an enlarged right side view of the audible feedbackgenerator of the handle assembly of FIG. 25, with various componentsremoved for clarity, and with the audible feedback generator moving evenfurther toward the fired position;

FIG. 27E depicts an enlarged right side view of the audible feedbackgenerator of the handle assembly of FIG. 25, with various componentsremoved for clarity, and with the audible feedback generator in thefired position;

FIG. 28A depicts a side view of the handle assembly of FIG. 25, with thevisual feedback generator in the unfired position as viewable throughthe indicia window of the handle assembly;

FIG. 28B depicts a side view of the handle assembly of FIG. 25, with thevisual feedback generator moving toward the fired position as viewablethrough the indicia window of the handle assembly;

FIG. 28C depicts a side view of the handle assembly of FIG. 25, with thevisual feedback generator in the fired position as viewable through theindicia window of the handle assembly;

FIG. 29 depicts a rear perspective view of another exemplary handleassembly having a rotational visual feedback generator and a tactilefeedback generator with various components removed for clarity;

FIG. 30 depicts an enlarged right side view of the rotational visualfeedback generator of the handle assembly of FIG. 29;

FIG. 31 depicts an enlarged right side view of the tactile feedbackgenerator of the handle assembly of FIG. 29;

FIG. 32 depicts a right side view of another exemplary end effector ofthe surgical stapling instrument of FIG. 11;

FIG. 33 depicts a front end view of the end effector of FIG. 32;

FIG. 34 depicts an enlarged right side view of the end effector of FIG.32;

FIG. 35 depicts an enlarged left side view of the end effector of FIG.32;

FIG. 36 depicts an enlarged cross-sectional view of the end effector ofFIG. 32, taken along section line 36-36 of FIG. 33;

FIG. 37 depicts an enlarged cross-sectional view of the end effector ofFIG. 32, taken along section line 37-37 of FIG. 33;

FIG. 38 depicts an enlarged cross-sectional view of the end effector ofFIG. 32, taken along section line 38-38 of FIG. 33;

FIG. 39 depicts a front right perspective view of an exemplary endeffector with a structural pin assembly;

FIG. 40 depicts a partially exploded front right perspective view of theend effector of FIG. 39;

FIG. 41 depicts a cross-sectional view of the end effector of FIG. 39,taken along a centerline of the structural pin assembly;

FIG. 42 depicts a right side view of the end effector of FIG. 32 havingvarious components removed for clarity;

FIG. 43 depicts a lower perspective view of a retaining pin of the endeffector of FIG. 32;

FIG. 44 depicts an upper perspective view of the retaining pin of FIG.43;

FIG. 45 depicts a cross-sectional view of the end effector of FIG. 32,taken along section line 45-45 of FIG. 42;

FIG. 46 depicts a right side view of the end effector of FIG. 32, withthe retaining pin in an unlocked closed position;

FIG. 47A depicts a cross-sectional view of a portion of the end effectorof FIG. 32, with the retaining pin in the unlocked closed position ofFIG. 46, taken along section line 47A-47A of FIG. 46;

FIG. 47B depicts a cross-sectional view of a portion of the end effectorof FIG. 32, with the staple cartridge moving toward the closed position;

FIG. 47C depicts a cross-sectional view of a portion of the end effectorof FIG. 32, with the retaining pin in a locked closed position;

FIG. 48 depicts a right side view of another exemplary end effectorhaving various component removed for clarity;

FIG. 49 depicts a lower perspective view of a retaining pin of the endeffector of FIG. 48;

FIG. 50 depicts an upper perspective view of the retaining pin of FIG.49;

FIG. 51 depicts a right side view of the end effector of FIG. 48, withthe retaining pin in an unlocked closed position;

FIG. 52 depicts a cross-sectional view of a portion of the end effectorof FIG. 51, taken along section line 52-52 of FIG. 51;

FIG. 53A depicts a cross-sectional view of a portion of the end effectorof FIG. 51, with the retaining pin in the unlocked closed position,taken along a centerline of the retaining pin;

FIG. 53B depicts a cross-sectional view of a portion of the end effectorof FIG. 51, with the retaining pin in a locked closed position;

FIG. 54A depicts a right side view of another exemplary end effectorhaving a retaining pin;

FIG. 54B depicts a right side view of the end effector of FIG. 54A, withthe retaining pin moving to a closed position;

FIG. 55 depicts a cross-sectional view of a portion of the end effectorof FIG. 54A, taken along section line 55-55 of FIG. 54B;

FIG. 56A depicts a rear perspective view of another exemplary endeffector having a retaining pin in an open position;

FIG. 56B depicts the rear perspective view of the end effector of FIG.56A, with the retaining pin in an unlocked closed position;

FIG. 56C depicts the rear perspective view of the end effector of FIG.56A, with the retaining pin in a locked closed position;

FIG. 57A depicts a right side sectional view of another exemplary endeffector having a retaining pin with various components removed forclarity;

FIG. 57B depicts a right side sectional view of the end effector of FIG.57A, with the retaining pin moving to the locked closed position;

FIG. 58A depicts a right side sectional view of another exemplary endeffector having a retaining pin in the open position, taken generallyalong a centerline of the retaining pin, with various components removedfor clarity;

FIG. 58B depicts a right side sectional view of the end effector of FIG.58A, with the retaining pin being moving from the open position to theunlocked closed position;

FIG. 58C depicts a right side sectional view of the end effector of FIG.58A, with the retaining pin in a locked closed position;

FIG. 59 depicts a right side view of the end effector of FIG. 32 withthe pin actuation mechanism in the closed position and the staplecartridge in a closed position;

FIG. 60 depicts the end effector of FIG. 32 having a staple driverassembly with various components removed for clarity;

FIG. 61 depicts a right perspective view of the staple driver assemblyof FIG. 60;

FIG. 62 depicts an upper side view of the staple driver assembly of FIG.60;

FIG. 63 depicts a right side view of the staple driver assembly of FIG.60;

FIG. 64 depicts a left side view of the staple driver assembly of FIG.60;

FIG. 65 depicts a right perspective view of another exemplary stapledriver assembly;

FIG. 66 depicts an upper side view of the staple driver assembly of FIG.65;

FIG. 67 depicts a right side view of the staple driver assembly of FIG.65;

FIG. 68 depicts a left side view of the staple driver assembly of FIG.65;

FIG. 69 depicts a right perspective view of another exemplary stapledriver assembly;

FIG. 70 depicts an upper side view of the staple driver assembly of FIG.69;

FIG. 71 depicts a right side view of the staple driver assembly of FIG.69; and

FIG. 72 depicts a left side view of the staple driver assembly of FIG.69.

The drawings are not intended to be limiting in any way, and it iscontemplated that various embodiments of the invention may be carriedout in a variety of other ways, including those not necessarily depictedin the drawings. The accompanying drawings incorporated in and forming apart of the specification illustrate several aspects of the presentinvention, and together with the description serve to explain theprinciples of the invention; it being understood, however, that thisinvention is not limited to the precise arrangements shown.

DETAILED DESCRIPTION

The following description of certain examples of the invention shouldnot be used to limit the scope of the present invention. Other examples,features, aspects, embodiments, and advantages of the invention willbecome apparent to those skilled in the art from the followingdescription, which is by way of illustration, one of the best modescontemplated for carrying out the invention. As will be realized, theinvention is capable of other different and obvious aspects, all withoutdeparting from the invention. Accordingly, the drawings and descriptionsshould be regarded as illustrative in nature and not restrictive.

It is further understood that any one or more of the teachings,expressions, embodiments, examples, etc. described herein may becombined with any one or more of the other teachings, expressions,embodiments, examples, etc. that are described herein. Thefollowing-described teachings, expressions, embodiments, examples, etc.should therefore not be viewed in isolation relative to each other.Various suitable ways in which the teachings herein may be combined willbe readily apparent to those of ordinary skill in the art in view of theteachings herein. Such modifications and variations are intended to beincluded within the scope of the claims.

For clarity of disclosure, the terms “proximal” and “distal” are definedherein relative to a human or robotic operator of the surgicalinstrument. The term “proximal” refers the position of an element closerto the human or robotic operator of the surgical instrument and furtheraway from the surgical end effector of the surgical instrument. The term“distal” refers to the position of an element closer to the surgical endeffector of the surgical instrument and further away from the human orrobotic operator of the surgical instrument. It will be furtherappreciated that for convenience and clarity, spatial terms such as“vertical,” “horizontal,” “lower,” “upper,” “front,” and “rear” are usedherein with respect to the drawings. However, surgical instruments areused in many orientations and positions, and these terms are notintended to be limiting and/or absolute.

I. Exemplary Surgical Stapler

FIG. 1A depicts an exemplary surgical stapling and severing instrument(10) that includes a handle assembly (12), a shaft assembly (14), and anend effector (16) distally projecting from shaft assembly (14). Itshould be understood that terms such as “proximal,” “distal,” “right,”and “left” are used herein with reference to a clinician gripping handleassembly (12) of surgical stapling instrument (10). Thus, end effector(16) is distal with respect to the relatively proximal handle assembly(14). Except as otherwise described herein, instrument (10) may beconfigured and operable in accordance with at least some of theteachings of U.S. Pat. Pub. No. 2005/0143759, entitled “Curved CutterStapler Shaped for Male Pelvis,” published on Jun. 30, 2005, thedisclosure of which is incorporated by reference herein; and/or U.S.Patent Application Publication No. 2017/0027571, entitled “SurgicalInstrument Comprising Systems for Assuring the Proper SequentialOperation of the Surgical Instrument,” published on Feb. 2, 2017, thedisclosure of which is incorporated by reference herein.

Handle assembly (12) includes several actuation mechanisms for operatingend effector (16) during the surgical procedure. To this end, exemplaryhandle assembly (12) includes a saddle shaped slide (18), a closuretrigger (20), and a firing trigger (22) in communication with endeffector (16) via shaft assembly (14). As shown in FIG. 1A, slide (18)and closure trigger (20) are in open configurations such that endeffector (16) is configured to receive tissue laterally within a gap(25) between an anvil (26) and a cartridge (28) of end effector (16).Translating slide (18) distally toward end effector (16) slides aretaining pin (30) of end effector distally as shown in FIG. 1B forcapturing the tissue between anvil (26) and cartridge (28). With respectto FIGS. 1C and 1D, sequentially actuating closure trigger (20) andfiring trigger (22) respectively compresses the tissue between anvil(26) and cartridge (28) in a closed configuration and then forms aplurality of staples (not shown) within the tissue and severs the tissuewith a knife (32) (see FIG. 6) for treatment. Additional detailsregarding these exemplary actuation mechanisms will be provided below ingreater detail.

A. Exemplary Handle Assembly and Shaft Assembly

As shown in FIGS. 1A and 2A, handle assembly (12) has a handle housing(34), a pair of handle frame plates (35, 36) within handle housing (34)extending along shaft assembly (14), saddle shaped slide (18), closuretrigger (20), and firing trigger (22) as briefly discussed above. Handlehousing (34) defines a hand grip (38), which the operator, such as asurgeon, grasps with the palm of at least one hand. Handle housing (34)is formed by a right shroud handle portion (40) and a left shroud handleportion (42). Closure trigger (20) is proximally positioned relative tofiring trigger (22) and each are pivotally mounted to frame plates (35,36) to extend underneath a remainder of handle assembly (12) formanipulation by the fingers of the operator. Closure and firing triggers(20, 22) are shown in unactuated positions prior to closing end effector(16) and firing staples (not shown) and/or knife (32) (see FIG. 6).Consequently, cartridge (28) is spaced from anvil (26) for receivingtissue within gap (25) therebetween.

Surgical stapling instrument (10) captures tissue via a tissue retainingpin actuation mechanism (37) prior to actuation of the closure andfiring triggers (20, 22). FIG. 1A shows retaining pin actuationmechanism (37), which includes slide (18), in the open configuration,whereas FIG. 2A shows retaining pin actuation mechanism (37) in theclosed configuration in greater detail. With respect to FIG. 2A, slide(18) is mounted on an upper surface of handle housing (34) and isconfigured to linearly translate between proximal and distal positions.Slide (18) connects to posts (44), which extend laterally outwardly froma push rod driver (46), through slots (48) (see FIG. 1A). Push roddriver (46) is restrained within handle housing (34) along longitudinalmovement by slots (48). Push rod driver (46) is connected to a proximalend of a push rod (50). A distal end of push rod (50) connects toretaining pin (30) (see FIG. 6) such that distal movement of slide (18)causes push rod (50) to similarly slide proximally along shaft assembly(14) for moving retaining pin (30) (see FIG. 6) to the closedconfiguration, which will be discussed below in greater detail.

A closure mechanism (52), which includes closure trigger (20), isconfigured to selectively move cartridge (28) toward the tissuepositioned between anvil (26) and cartridge (28) in the closedconfiguration in anticipation of stapling and/or cutting the tissue.Closure mechanism (52) further includes an elongated closure member(54), with a generally U-shaped cross-section, extending distally fromhandle assembly (12), through shaft assembly (14), and into end effector(16) for receiving a cartridge (28) (see FIG. 3) at a distal end portionthereof as discussed below. A proximal end portion of closure member(54) is operatively connected to closure trigger (20) by a plurality oflinkages configured to convert pivoting motion of closure trigger (20)into translation of closure member (54). More particularly, theintermediate and proximal end portions of closure member (54) extendthrough handle assembly (12) between left and right handle frame plates(35, 36). Right and left closure links (56) are respectively pivotallyattached at the right and left proximal ends of closure member (54) byan integral closure link pin (58). At an opposite end of the closurelinks (56), closure links (56) are pivotally attached to anotherintegral closure link pin (60). Closure link pin (60) connects closurelinks (56) to a slotted closure arm link (62), which is pivotallymounted to handle frame plates (35, 36) at a closure trigger pin (64).Closure trigger (20) descends from the slotted closure arm link (62) forpivotal rotation about closure trigger pivot pin (64) both toward andaway from hand grip (38). A closure spring (66) housed within hand grip(38) is secured to the slotted closure arm link (62) to provide adesired resistance when the operator squeezes closure trigger (20)toward hand grip (38), and to bias closure trigger (20) toward the openposition.

Closure member (54) is further configured for directing movement oftissue retaining pin actuation mechanism (37) to automatically directmovement of the retaining pin (30) to the closed configuration while theoperator squeezes closure trigger (20). Such automation may be useful inthe event that the operator did not manually move the slide (18) to thedistal position before actuating trigger (20). Closure member (54)includes posts (68), which extend laterally on each opposing side ofclosure member (54) within handle housing (34). Posts (68) slidablyconnect to a yoke (70) via L-shaped slots (72). Yoke (70) is pivotallymounted within handle housing (34) by a pivot pin (74). Yoke (70)further includes cam pins (76) that are configured to push cammingsurfaces (78) on push rod driver (46). Thus, actuating closure trigger(20) to an intermediate position shown in FIG. 2A directs the closuremember (52) distally and, in turn, causes yoke (70) to engage push roddriver (46) and force retaining pin (30) (see FIG. 1B) to the closedposition. Slide (18) is thereby dragged along handle housing (34) fromthe proximal position to the distal position in the event that theoperator did not manually manipulate slide (18) to the distal positionbefore actuating trigger (20).

The operator further squeezes the closure trigger (20) to the hand grip(38) as shown in FIGS. 1C and 2B to effectively set surgical staplinginstrument (10) in the closed configuration prior to forming the staples(not shown) and severing the tissue as discussed briefly above.Exemplary handle assembly (12) is configured to form the staples (notshown) and sever the tissue via a firing mechanism (80) upon operatormanipulation of firing trigger (22) toward closure trigger (20) as shownin FIGS. 1D and 2C. With respect to FIGS. 1C, 1D, 2B, and 2C, firingmechanism (80), which includes firing trigger (22), has a firing bar(82) extending distally from handle assembly (12) and within endeffector (16). A distal end of firing bar (82) cooperates with cartridge(28) as discussed below in greater detail, whereas a proximal end offiring bar (82) is operatively connected to firing trigger (80) forselective firing thereof.

Firing bar (82) has a rectangular receiving slot (84) (see FIG. 2A) in aportion of firing bar (82) positioned within handle housing (34).Integral closure link pin (58) extends through receiving slot (84). Theunderside of the proximal end portion of firing bar (82) has a slidingsurface (86). The proximal end portion of firing bar (82) also has aterminal side engagement surface (82) extending from sliding surface(86). Firing trigger (22) is pivotally mounted to handle frame plates(35, 36) by a firing trigger pin (90) spaced from closure trigger pin(64) such that each of pins (90, 64) pivot about mutually independentaxes. Firing trigger (22) includes an arcuate firing trigger link (92)extending from firing trigger (22) at firing trigger pin (90) to an apex(94), which rests on sliding surface (86) of the proximal end portion offiring bar (82). Within handle assembly (12), firing trigger (22) isattached to firing trigger spring arms (95, 96), respectively. Firingtrigger spring arms (95, 96) support a torsion spring (not shown) on theright half of firing trigger (22). Finally, a firing bar return spring(98) is secured to the underside of firing bar (82) at the portion offiring bar (82) within handle assembly (12) to bias firing bar (82)toward its unactuated position.

As the operator squeezes closure trigger (20) toward hand grip (38),slotted closure arm link (62) and closure links (56) move distallywithin receiving slot (84) of firing bar (82). This distal movementcauses closure member (54) to correspondingly move distally. Likewise,firing bar (82) concurrently moves distally with closure member (54),because integral closure link pin (58), to which closure links (56) areattached, extends through receiving slot (84) in firing bar (82) (seeFIG. 2A). Thereby, firing bar (82) is forced distally to form thestaples (not shown) in the tissue and/or sever the tissue with knife(32) (see FIG. 6). Finally, the operator may fully squeeze firingtrigger (22) toward hand grip (38) to “fire” surgical staplinginstrument (10) and force firing bar (82) further distally to form thestaples (not shown) and sever the tissue. This distal movement of firingbar (82) may also be referred to herein as “firing” the firing bar (82)to the actuated or “fired” position.

Upon operator release of one or both of closure and firing triggers (20,22) while one or both of triggers (20, 22) is/are in a fired position,or in an intermediate position between the unactuated and firedpositions, surgical stapling instrument (10) may be further configuredto releasably lock in one of a variety of configurations. The operatormay then release the hand grip (38) to free one or more hands foranother task during the surgical procedure and, when desired, releasesurgical stapling instrument (10) from its locked position by releasebutton (24). By way of example, surgical stapling instrument (10) has anintermediate closure detent position and a closure detent position. Withrespect to FIGS. 2A-2C, the top side of the slotted closure arm link(62) has a clamp sliding surface (102) that displays an intermediatedetent (104) and a closure detent (106). A release pawl (108) slides onclamp sliding surface (102) and may engage intermediate and closuredetents (104, 106). Release pawl (108) has a laterally extending pawllug (110) at its distal end.

Release pawl (108) is located within handle assembly (12) and isintegrally formed with release button (24), which is situated exteriorof handle housing (34) for manipulation by the operator. Release button(24) has a thumb rest (112) pivotally attached to handle housing (34) bya release trunnion (114). Release button (24) is biased outwardly fromhandle housing (34) and, therefore, release pawl (108) is biaseddownwardly toward clamp sliding surface (102) by a release spring (116).Release spring (116) is mounted to handle housing (34) by a springretention pin (118) and is mounted to release button (24) by a buttonspring post (120). Slotted closure arm link (62) has an arcuate recess(122) located between intermediate and closure detents (104, 106).Resting within arcuate recess (122) for rotational movement areintegrally connected left and right hand toggles (124). Each toggle(124) has a toggle arm (126) that is engageable with pawl lug (110).

In order to releasably lock handle assembly (12), toggle arms (126) frompawl lug (110) disengage from pawl lug (110) as closure trigger (20) issqueezed toward hand grip (38). Consequently, as toggle (124) continuesto rotate in a clockwise direction, release pawl lug (108) rides uptoggle arms (126) and, with continued motion of closure trigger (20),falls into one of intermediate and closure detents (104, 106), dependingon the position of closure trigger (20) in use. As release pawl (108)rides up toggle arm (126), release pawl (108) rotates release button(24) clockwise. Release pawl (108) thereby falls into one ofintermediate and detents (104, 106) and generates an audible clickingsound alerting the surgeon that one of the intermediate and closurepositions have been reached.

In order to release handle assembly (12) from the intermediate orclosure positions discussed herein, the surgeon depresses release button(24). In turn, release pawl (108) pivots about release trunnion (114) ina clockwise direction to dislodge pawl lug (110) from one of theintermediate and closure detents (104, 106). As pawl lug (110) isdislodged, pawl lug (110) rides on toggle arms (126) to anotherposition, such as the unactuated position. Therefore, the operator mayrelease closure and firing triggers (20, 22) such that each may returnto the unactuated positions FIG. 1A and FIG. 3.

Surgical stapling instrument (10) of the present example includes eachof handle frame plates (35, 36), push rod (50), closure member (54), andfiring bar (82) extending continuously from handle assembly (12) to endeffector (16), thereby defining shaft assembly (14) extendingtherebetween. Handle frame plates (35, 36), push rod (50), closuremember (54), and firing bar (82) of surgical stapling instrument (10)provide merely a subset of elongated components extending distally fromhandle assembly (12) as shaft assembly (14). Alternatively, shaftassembly (14) may include additional components, such as an articulatingjoint, or may include a rearrangement of various components such thatshaft assembly (14) may be modular relative to handle assembly (12). Inany case, it will be appreciated that the invention is not intended tobe limited to shaft assembly (14) described herein, and may includevarious alternative arrangements for operatively connecting end effector(16) to handle assembly (12). Of course, handle assembly (12) and shaftassembly (14) may have a variety of other components, features, andoperabilities, in addition to or in lieu of any of those noted above.Other suitable configurations for handle and shaft assemblies (12, 14)will be apparent to those of ordinary skill in the art in view of theteachings herein.

B. Exemplary End Effector

As also shown in FIGS. 3-5 and discussed briefly above, end effector(16) of the present example includes anvil (26), replaceable cartridge(28) including a plurality of staples (not shown) and knife (32) (seeFIG. 6), and retainer pin (30). While end effector (16) of the presentexample is adapted for use in conjunction with replaceable cartridge(28) having various components, it will be appreciated that the conceptsunderlying the present invention could be applied to a variety of endeffector and cartridge constructions for treating the patient.

End effector (16) provides a surgical fastening assembly that includescartridge (28) received within a C-shaped supporting structure (128).The term C-shaped is used throughout the specification to describe theconcave nature of supporting structure (128) and cartridge (28). TheC-shaped construction facilitates enhanced functionality and access totissue within the patient. The term “C-shaped” as used herein should beconstrued to include a variety of concave shapes that would similarlyenhance the functionality of surgical stapling and cutting instruments.By way of example only, the C-shape of supporting structure (128) may besized to promote access to the lower colon within the pelvic bowl of apatient, such as to perform a LAR in a proctocolectomy procedure.

Supporting structure (128) of end effector (16) is respectively attachedto handle frame plates (35, 36) of shaft assembly (14) by a shoulderrivet (129) and posts (130) which extend from supporting structure (128)into receiving holes in handle frame plates (35, 36). The distal end ofclosure member (54) is disposed to receive cartridge (28) thereon fordirecting cartridge (28) to the closed configuration. Upon return ofcartridge (28) from the closed configuration to the open configuration,cartridge (28) further includes a safety lockout mechanism (131) (seeFIG. 7A) configured to inhibit inadvertently re-firing cartridge (28).Safety lockout mechanism (131) will be discussed below in additionaldetail.

Cartridge (28) includes anvil (26) coupled to a cartridge housing (132).Cartridge (28) also includes retaining pin (30) and a tissue contactingsurface (34), which defines a plurality of staple-containing slots (136)in staggered formation in one or more rows on either side of knife (32)(see FIG. 6). Staples (not shown) are fired from cartridge housing (132)against a staple-forming surface (138) of anvil (26) that facestissue-contacting surface (134) of cartridge housing (132). Cartridge(28) may also include a removable retainer (not shown) for storagebetween anvil (26) and tissue contacting surface (34) prior to and/orafter use in order to inhibit unintended contact with various portionsof cartridge (28).

As shown in FIGS. 4-6, cartridge (28) includes a staple driver assembly(140) within cartridge housing (132) and proximally positioned behindthe plurality of staples (not shown) within staple-containing slots(136). Driver assembly (140) of the present example is formed as aunitary structure of a plurality of staple drivers (141). Thus, the term“assembly” is not intended to be limited to an assembly of individualcomponents, but may also include integrally formed components withunitary structures. Driver assembly (140) is configured to push thestaples (not shown) respectively out of staple containing slots (136)and toward anvil (26) for formation. A knife holder (142) is disposedimmediately proximal of driver assembly (140) in cartridge housing (132)and defines a slot (144) and ledge (146) for interaction with a kniferetractor hook (148) (see FIG. 10B), which is discussed below in greaterdetail. Knife holder (142) is attached to knife (32) such that knife(32) extends distally from knife holder (142) through a slot (150) indriver assembly (140) and through another slot (152) in cartridgehousing (132). Although knife (32) is disclosed as being withincartridge housing (132) in the present example, other configurations mayalso be used. For example, it will be appreciated that cartridge (28)may alternatively not include knife (32) for alternative treatments.

Knife holder (142) has a detent post (154) that extends through a slot(155) in cartridge housing (132). Detent post (154) is positioned inorder to contact a detent protrusion (156) of cartridge slot (155)during the longitudinal travel of knife (132) and knife holder (142).Similarly, driver assembly (140) has a detent post (158) positioned inorder to contact proximal and distal detent protrusions (159, 160) ofcartridge slot (155).

Knife (32) and slots (150, 152) are positioned such that there is atleast one row of staples (not shown) on either side of knife (132). Insome versions, two rows of staple slots (136) containing respective rowsof staples (not shown) are provided on each side of slot (152) ofcartridge housing (132).

Cartridge housing (132) defines two longitudinally extending, generallycircular holes (162, 164) at respective ends of knife slot (152). Moreparticularly, hole (162) at a lower portion of cartridge housing (132)is shaped and dimensioned to receive a guide pin (166) through cartridgehousing (132). Hole (164) at an upper portion of cartridge housing (132)is shaped and dimensioned to slidably receive retaining pin (30) throughcartridge housing (132). Staple slots (136) of the present example arearranged such that the staples (not shown) laterally extend past thegenerally circular holes (162, 164).

Anvil (26) of the present example includes a plastic cutting washer(168) and a metallic staple-forming surface (138). Anvil (26) isdisposed to maintain staple-forming surface (138) in alignment with thestaples (not shown) to receive and form the staples (not shown) thereon.Retaining pin (30) is connected to a couplet (170) by a circumferentialslot (172) in retaining pin (30) and a groove (not shown) in couplet(170). Couplet (170) is disposed within an arm (176) of cartridgehousing (132) and is secured to arm (176) by an end cap (178).

Guide pin (166) and retaining pin (30) include respective slots (180,182) (see also FIGS. 8-9) into which lower and upper ends (184, 186) ofknife (32) are slidably disposed. A proximal end (188) of guide pin(166) is connected to anvil (26), whereas a distal end (190) of guidepin (166) extends from cartridge housing (132) and extends through aslot (192) in anvil (26). Cutting washer (168) slips onto anvil (26) viagroove (194). Thereby, cutting washer (168) is configured to trap guidepin (166) in the opening formed by slot (192) in anvil (26) and acutting surface (157) of anvil (26) for connecting anvil (26) tocartridge housing (132).

Lockout mechanism (131) is shown in FIG. 7A in greater detail. Lockoutmechanism (131) is configured to inhibit full proximal movement ofcartridge housing (132) to its unactuated position after firing. To thisend, lockout mechanism (131) of the present example includes a lockoutlever (196) that is pivotally mounted to the distal end of closuremember (54) by a pin (198). Lockout lever (196) is spring biased towardthe proximal end portion of supporting structure (128) by a spring (notshown). A proximal end portion of lockout lever (196) has a cam surface(200) and a locking groove (202). Supporting structure (128) of endeffector (16) also has a ledge (204) that is configured to cooperatewith locking groove (202) when lockout mechanism (131) is engaged. Incontrast, supporting structure (128) has a base surface (206) configuredto cooperate with cam surface (200) when lockout lever (13 is notengaged.

C. Exemplary Actuation of Cartridge

In the present example, cartridge (28) is driven toward anvil (26) viaclosure member (54) until reaching the closed configuration with tissuepositioned between cartridge (28) and anvil (26) as discussed above withrespect to handle assembly (12). From the closed configuration, knife(32) and staple driver assembly (140) are further moved toward anvil(26) via firing bar (82) to form staples (not shown) in the tissue,fluidly seal the tissue, and sever the tissue for treating the patient.While actuation of cartridge (28) includes stapling and severing tissuein this example, it will be appreciated that one or more of these stepsmay be omitted from treatment as desired by the operator. Moreover, itwill be appreciated that surgical stapling instrument (10) may bereconfigured to perform these steps simultaneously or sequentially asdesired. For example, actuation of firing bar (82) causes driverassembly (140) and knife (32) to move distally toward anvil (26) in thepresent example. Alternatively, surgical stapling instrument (10) may bereconfigured to selectively fire one of staples (not shown) or knife(32), or selectively fire staples (not shown) and then knife (32), orvice versa. It should therefore be understood that the invention is notintended to be limited to the particular operation of surgical staplinginstrument (10) or the associated treatment.

As shown in FIG. 7A, cartridge (28) is spaced proximally from anvil (26)to receive tissue within gap (25) in the open configuration. With tissuereceived between cartridge (28) and anvil (26), the operator manuallydirects push rod (50) distally via slide (18) as discussed above andshown in FIG. 7B. Push rod (50) is operatively connected to couplet (70)(see FIG. 6), which is connected to retaining pin (30). Thus, distallytranslating push rod (50) similarly translates retaining pin (30) toextend from cartridge (28) to anvil (26) and capture tissue betweenretaining pin (30) and guide pin (166).

As shown in FIG. 7C, manipulation of closure trigger (20) (see FIG. 1C)forces closure member (54) to translate distally relative to supportingstructure (128) of end effector (16). Closure member (54) supportscartridge (28) thereon such that distal translation of closure member(54) similarly moves firing bar (82) and cartridge (28) toward anvil(26). With cartridge (28) in the closed configuration and the tissueeffectively captured in the end effector (16), the operator manipulatesfiring trigger (22) (see FIG. 1D) toward anvil (26) to the firedposition. Distal translation of firing bar (82) causes firing bar (82)to engage knife holder (142), which supports both driver assembly (140)and knife (32) extending through driver assembly (140) as shown in FIG.7D. In turn, driver assembly (140) directs staples (not shown) fromstaple slots (136) and against staple-forming surface (138) to form thestaples (not shown) within the tissue for fluidly sealing the tissue. Asthe staples (not shown) are formed, knife (32) continues to translatedistally through tissue and into anvil (26) to sever the fluidly sealedtissue. FIGS. 8-9 illustrate the fired cartridge (28) in greater detail,with knife (32) guided along cartridge housing slot (152), guide pinslot (180); and with retaining pin slot (182) between rows of stapleslots (136) toward anvil (26).

Once fired, the operator may depress release button (24) (see FIG. 2C)and withdraw closure member (54) and firing bar (82) proximally from theactuated, fired position to the unactuated position shown in FIGS.10A-10B. More particularly, retractor hook (148) engages knife holder(142) to pull knife (32) proximally. At approximately the same time, ascartridge (28) translates proximally with closure member (54), lockoutlever (196) of lockout mechanism (131) engages cartridge housing (132)to hold cartridge housing (132) in position. Thereby, the continued pullof knife (32) retracts knife (32) within cartridge housing (132) toinhibit unintended contact by operator with knife (32). Cartridge (28)may then be removed from supporting structure (128) of end effector(16), discarded, and replaced for further treatment if so desired. Ofcourse, various suitable settings and procedures in which surgicalstapling instrument (10) may be used will be apparent to those ofordinary skill in the art in view of the teachings herein.

It should also be understood that any other components or features ofsurgical stapling instrument (10) may be configured and operable inaccordance with any of the various references cited herein. Additionalexemplary modifications that may be provided for surgical staplinginstrument (10) will be described in greater detail below. Varioussuitable ways in which the below teachings may be incorporated intosurgical stapling instrument (10) will be apparent to those of ordinaryskill in the art. Similarly, various suitable ways in which the belowteachings may be combined with various teachings of the references citedherein will be apparent to those of ordinary skill in the art. It shouldalso be understood that the below teachings are not limited to surgicalstapling instrument (10) or devices taught in the references citedherein. The below teachings may be readily applied to various otherkinds of instruments, including instruments that would not be classifiedas surgical staplers. Various other suitable devices and settings inwhich the below teachings may be applied will be apparent to those ofordinary skill in the art in view of the teachings herein.

II. Exemplary Surgical Stapling Instruments with Alternative Handle andShaft Assemblies

While the above surgical stapling instrument (10) provides one exampleof handle assembly (12) having shaft assembly (14) projecting distallytherefrom, it will be appreciated that the operator may desire analternative handle assembly and/or shaft that may be used with endeffector (16) or another, alternative end effector depending on one of avariety particular treatments. For example, as the operator manipulateshandle assembly (12) such that end effector (16) accesses the tissuewithin the patient, shaft assembly (14) may also contact the surroundingtissue within the patient. While some tissues may be capable ofsustaining contact with shaft assembly (14) without injury, other, moresensitive tissues, may be damaged by contact with shaft assembly (14),particularly in the event that shaft assembly (14) is relatively sharpand rigid in one or more regions. It may therefore be desirable toprovide a surgical stapling instrument (310) with a shaft assembly (314,614) having a relatively rounded outer profile to reduce the likelihoodthat tissue contact with shaft assembly (314, 614) may inadvertentlydamage surrounding tissue. The outer profiles of shaft assemblies (314,614) are best seen in FIGS. 14-15.

Likelihood of injury may be further decreased with additionalcommunication from surgical stapling instrument (10) to the operatorregarding the status of instrument operation. In some versions, theoperator manipulates one or both of closure and firing triggers (20, 22)to actuate surgical stapling instrument (10) from the openconfiguration, to the closured configuration, and further to the firedconfiguration during use. However, due to the hectic nature of thesurgical procedure and/or lack of familiarity with surgical staplinginstrument (10), the operator may be become unaware of the particularconfiguration of end effector (16) positioned within the patient. It maytherefore be desirable to provide a surgical stapling instrument (310)with a handle assembly (312, 612, 912) that is configured to communicateor indicate the particular configuration of end effector (16) to theoperator during use.

Shaft assemblies (314, 614) and handle assemblies (312, 612, 912) aredescribed below in the context of a proctocolectomy surgical procedure.While the following description of shaft and handle assemblies (314,614, 312, 612, 912) and method of treatment is provided in the contextof stapling and/or cutting colon tissue, it will be appreciated thatsurgical stapling instrument (310) and any of shaft and handleassemblies (314, 614, 312, 612, 912) may be alternatively configured totreat any tissue in the human body with similar features. It should alsobe understood that the features discussed below may be readilyincorporated into surgical stapling instrument (10) discussed above. Tothis end, like numbers indicate like features described above in greaterdetail.

A. Exemplary Surgical Stapling Instrument Having Shaft Assembly with aRounded Outer Profile

FIGS. 11-13 show surgical stapling instrument (310) with handle assembly(312) and shaft assembly (314) extending distally from handle assembly(312). An end effector (316) extends distally from shaft assembly (314)and is configured to fluidly seal and sever tissue with staples (notshown) and knife (32) (see FIG. 6) similar to end effector (16)discussed above in greater detail. To this end, the operator squeezesclosure trigger (20) to selectively translate a closure member (354)distally to the closed configuration with tissue captured therein. Theoperator further squeezes firing trigger (22) to selectively translatefiring staples (not shown) and knife (32) (see FIG. 6) from a cartridge(328).

1. Exemplary Shaft Assembly with Rounded Closure Member

FIGS. 12-14 show shaft assembly (314) in greater detail. Shaft assembly(314) defines a rounded outer profile (510) that is generally continuousabout shaft assembly (314) and is thereby configured to avoid damagingtissue upon contact with tissue during use of instrument (310) in asurgical procedure. Rounded outer profile (510) is more particularlydefined collectively by left and right handle frame plates (35, 36),closure member (354), firing bar (82), and push rod (50) extending alongan upper portion of closure member (354). Closure member (354) has apair of lateral slots (512, 514) extending longitudinally therealongthat are configured to receive handle frame plates (35, 36),respectively. In addition, closure member (354) has an upper roundedsurface (516) and an opposing lower rounded surface (518), whereashandle frame plates (35, 36) are generally planar so as to be receivedwithin respectively lateral slots (512, 514). Frame plates (35, 36) arethereby flush with the surrounding upper and lower rounded surfaces(516, 518) so as to be free of sharp or abrasive edges that may damagetissue. Rounded outer profile (510) thus has rounded upper and lowerportions that may pass along tissue atraumatically. However, it will beappreciated that alternative shaft assemblies with alternative roundedouter profiles may be constructed for inhibiting such tissue damage.

2. Exemplary Shaft Assembly with Rounded Handle Frame Plates

Another exemplary shaft assembly (614) is also configured to avoiddamaging tissue via an alternative rounded outer profile (810) shown inFIGS. 15-16. Rounded outer profile (810) is collectively defined by leftand right rounded frame plates (635, 636), a closure member (654),firing bar (82), and push rod (50) extending along an upper portion ofclosure member (654). Closure member (654) includes an upper cap (812)extending upwardly therefrom. In addition, rounded frame plates (635,636) each have rounded upper and lower portions (814, 816) with a planarintermediate portion (818) extending therebetween to define a generallyC-shape. Rounded upper portions (814) of each rounded frame plate (635,636) are positioned partially under upper cap (812) to be generallyflush with upper cap (812). The planar intermediate portions (818) andlower rounded portions (816) of each rounded frame plate (635, 636)cradle opposing lateral sides of closure member (654) such that closuremember (654) is generally surrounded by rounded frame plates (635, 636)on each lateral side. Rounded outer profile (810) thus has rounded upperand lower portions that may pass along tissue during use with reducedabrasiveness that may otherwise damage the tissue.

B. Exemplary Surgical Stapling Instrument with Feedback Generator

FIGS. 11-13 and 17 show surgical stapling instrument (310) with handleassembly (312) and shaft assembly (314) extending distally from handleassembly (312). End effector (316) extends distally from shaft assembly(314) and is configured to fluidly seal and sever tissue with staples(not shown) and knife (32) (see FIG. 6) similar to end effector (14)discussed above in greater detail. To this end, the operator squeezesclosure trigger (20) to selectively translate a closure member (354)distally to the closed configuration with tissue captured therein. Theoperator further squeezes firing trigger (22) to selectively translatefiring staples (not shown) and knife (32) (see FIG. 6) from a cartridge(328).

During manipulation of closure and firing triggers (20, 22), a feedbackgenerator (520, 820, 822, 1110, 1112) contained within handle assembly(312) is configured to provide at least one of an audible feedback, avisual feedback, or a tactile feedback to the operator in real time withrespect to the operational state or configuration of the surgicalstapling instrument (310). For example, surgical stapling instrument(310) may provide feedback when firing trigger (22) fires firing bar(82) a full distal stroke so that the operator may confirm the end ofstroke via the feedback.

1. Exemplary Translational Feedback Generator with Audible and VisualFeedback

FIGS. 17-20 show exemplary handle assembly (312) having a translationalfeedback generator (520) that is configured to generate audible andvisual feedback when firing trigger (22) fires firing bar (82) to formstaples (not shown) and sever the tissue as discussed above.Translational feedback generator (520) includes a slide feedbackassembly (522) supported within a handle housing (334) and adjacent toindicia windows (524), which extend through handle housing (334) foroperator view of slide feedback assembly (522) in use. Handle housing(334) also supports a sound generator (526) adjacent to slide feedbackassembly (522) such that distal movement of slide feedback assembly(522) causes slide feedback assembly (522) to pluck sound generator(526) to generate an audible click when firing bar (82) is fired. Soundgenerator (526) may also be configured to temporarily increaseresistance to manipulation of firing trigger (22) as sound generator(526) is plucked to further generate tactile feedback to the operatorthrough firing trigger (22).

FIGS. 17-19 show inner surfaces of left and right shroud handle portions(342, 340) that collectively form handle housing (334) upon assembly.Each shroud handle portion (342, 340) includes a pair of offset supportguides (528) extending inwardly to define a pair of slide channels (530)on opposing sides of handle housing (334). Each slide channel (530)slidably receives a lateral end of a sled (532) (see FIG. 20) such thatsled (532) (see FIG. 20) is slidably supported between support guides(528). Slide feedback assembly (522) is further connected to mount holes(533) extending inwardly from left and right shroud handle portions(342, 340) and will be discussed below in additional detail. Rightshroud handle portion (342) further includes a mounting arrangement(534) in which to secure sound generator (526) (see FIG. 20) adjacent toslide feedback assembly (522). In order to provide viewing of slidefeedback assembly (522), each exemplary shroud handle portion (342, 340)includes one indicia window (524) adjacent to a respective support guide(528) for viewing one of a plurality of indicia operatively connected tosled (532) (see FIG. 20) as sled (532) (see FIG. 20) moves along slidechannels (530) to indicate whether or not surgical stapling instrument(310) has been fired.

Slide feedback assembly (522) and sound generator (526) are shown ingreater detail in FIGS. 20 and 21. While sound generator (526) ismounted within handle housing (334) rather than to slide feedbackassembly (522), sound generator (526) has been included here for clarityas to the exemplary arrangement of slide feedback assembly (522)relative to sound generator (526). Slide feedback assembly (522)includes sled (532), a feedback member (536) mounted on top of sled(532) via a fastener (538), and a linkage coupling (540). Feedbackmember (536) and sled (532) are configured to provide for calibration ofaudible and visual feedback, whereas linkage coupling is configured pullsled (532) with feedback member (536). To this end, feedback member(536) is adjustably mounted to sled (532) via fastener (538) toaccommodate manufacturing deviations that may occur in handle and shaftassemblies (312, 314). More particularly, feedback member (536) receivesfastener (538) within an elongated hole (541) that extendslongitudinally as well as through feedback member (536). Depending onpart deviation, the feedback member (536) may be positioned moredistally or more proximally relative to sled (532) for calibration suchthat feedback member (536) communicates the audible and visual feedbackat effectively the same approximate time as completion of the firingstroke.

Linkage coupling (540) is generally H-shaped such that an upper portionhas an upper pair of legs (542) extending opposite of a pair of lowerlegs (544). Upper pair of legs (542) has a shortened dowel (546)spanning between each leg (542), whereas lower pair of legs (544) has anelongated dowel (548) spanning between each leg (544). Shortened dowel(546) pivotally connects linkage coupling (540) to sled (532) via a hole(549) in sled (532). In contrast, elongated dowel (546) provides a catchby which to engage firing bar (82) as described with respect to FIGS.23A-23C below. Each of the lower pair of legs (544) further includes anoutwardly extending pivot pin (550) that is configured to berespectively received within mount holes (533) (see FIGS. 17-18) forpivotally mounting linkage coupling (540) to handle housing (334).

Feedback member (536) includes a pair of proximally extending legs (552)and a distally extending, L-shaped pick (554), which projects towardsound generator (526) to pluck sound generator (526) in use. Each oflegs (552) aligns with a respective indicia window (524) and includes anunfired indicia (556) adjacent to a fired indicia (558). Unfired indicia(556) and fired indicia (558) may be viewed by the operator through eachindicia window (524) as the operator selectively actuates firing bar(83) from the unfired position to the fired position. In addition, soundgenerator (526) has a plurality of feedback tabs (560) that arecantilevered upwardly and configured to resonate with audible feedbackafter being plucked by pick (554).

Linkage coupling (540) is further configured to magnify movement of theunfired and fired indicia (556, 558) relative to firing bar (82) forgreater resolution when viewed by the operator through indicia window(524) for improved visibility during use. Exemplary linkage coupling(540) is pivotally mounted about pivot pins (550) such that elongateddowel (548) is a shortened radial distance from pivot pins (550) thanshortened dowel (546). In other words, pivotal movement about pivot pins(550) results in shortened dowel (546) moving a greater distance thanelongated dowel (546). The movement of sled (532), which is directlyconnected to shortened dowel (546) will thereby be magnified relative tofiring bar (82) and handle housing (334). Thus, relatively smallmanipulations of firing trigger (22) will result in relatively largemovement of unfired and fired indicia (556, 558) within indicia window(524) for greater resolution and improved viewing by the operator.

With respect to FIGS. 22 and 23A, slide feedback assembly (522) is in arelatively distal position within slide channel (530) such that pick(554) is distally positioned from feedback tabs (560) and firing bar(82) is in a relatively distal, unfired position prior to firing bar(82). The operator squeezes firing trigger (22) to simultaneously directfiring bar (82) distally toward the fired position. As firing bar (82)translates distally between lower legs (544), a catch element (562) thatextends upwardly from firing bar (82) engages elongated dowel (548) asshown in FIG. 23B. Thereby, firing bar (82) distally pivots linkagecoupling (540) about pivot pins (550) such that linkage coupling (540)pulls sled (532) distally along slide channels (530). Sled (532) thuscarries feedback member (536) distally as pick (554) plucks feedbacktabs (560) to audibly indicate to the operator that firing bar (82) hasbeen fired.

Distal translation of feedback member (536) to indicate firing furthertranslates unfired indicia (556) and fired indicia (558) relative toindicia window (524) as shown in FIGS. 24A-24C. Specifically, FIG. 24Aillustrates unfired indicia (556) in alignment with indicia window (524)prior to firing. The operator squeezes firing trigger (22) and, asfiring bar (82) fires distally, unfired indicia (556) and fired indicia(558) translate distally as shown in FIG. 24B. Finally, fired indicia(558) aligns with indicia window (524) once firing is complete toindicate to the operator that surgical stapling instrument (310) (seeFIG. 11) has been fired.

2. Exemplary Translational Visual Feedback Generator and AudibleFeedback Generator

FIG. 25 shows an exemplary alternative handle assembly (612) that has avisual feedback generator (820) and an audible feedback generator (822).Visual feedback generator (820) includes an unfired indicia (824)positioned distally from and adjacent to a fired indicia (826). Each ofunfired indicia (824) and fired indicia (826) are positioned directly onfiring bar (82) and move with firing bar (82) to indicate firing to theoperator. To enable viewing of indicia (824, 826) on firing bar (82), apair of indicia windows (828) extend in alignment with indicia (824,826) through handle frame plate (635) and shroud handle portion (42).Indicia windows (828) align with unfired indicia (824) and fired indicia(826), respectively, in the unfired state such that the operator mayview the unfired indicia (824) and fired indicia (826) therethrough.While the particular alignment of indicia (824, 826) and windows (828)may be beneficial for viewing by a right-handed grip of handle assembly(612), it will be appreciated that similar features may be positioned onan opposite side of handle assembly (612) for more easily being viewedby an operator using a left-handed grip.

Audible feedback generator (822) is shown in greater detail in FIGS. 26and 27A to include a resiliently mounted clip (830) extending fromfiring bar (82) so as to align with a ramp (832) integrally formed withinner surface of shroud handle portion (42). As shown in succession inFIGS. 27A-27C, firing (actuating) firing bar (82) forces audiblefeedback generator (822) to translate distally such that clip (830)engages and rises along a top surface of ramp (832). As clip (830)continues to rise along ramp (832), clip (830) is resiliently cocked attop of ramp (832) and continues to be resiliently biased downwardlytoward a drum surface (834) in FIG. 27D. Clip (830) continues totranslate distally until falling off of ramp (832) and snapping toengage drum surface (834) to generate an audible click. Clip (830) isconfigured to generate the click as firing bar (82) completes the firingstroke as shown in FIG. 27E. As firing bar (82) moves distally to cockclip (830), unfired indicia (824) and fired indicia (826) move distallyas shown in FIGS. 28A-28B. Finally, with firing bar (82) in the firedposition, fired indicia (826) is visible to the operator through indiciawindows (824) to indicate that the firing bar (82) has effectively beenfired during use.

3. Exemplary Rotational Visual Feedback Generator and Tactile FeedbackGenerator

FIGS. 29-31 show another exemplary alternative handle assembly (912)that includes a rotational visual feedback generator (1110) and atactile feedback generator (1112). Rotational visual feedback generator(1110) includes a generally cylindrical wheel (1114) having a peripheralouter surface with an unfired indicia (1116) and a fired indicia (1118).Handle housing (934) includes an indicia window (not shown) adjunct tothe peripheral outer surface such that the operator may view the unfiredindicia (1116) and fired indicia (1118) during use as discussed abovewith respect to alternative unfired and fired indicia.

A driven tab (1120) extends radially outwardly from the peripheral outersurface of wheel (1114), whereas a drive tab (1122) extends upwardlyfrom firing bar (82). As shown in FIG. 30, drive tab (1122) isconfigured to engage driven tab (1120) and rotate wheel (1114) to thefired position and display the fired indicia (1118) through indiciawindow (not shown) to indicate that firing bar (82) has been fired.

With respect to FIG. 31, tactile feedback generator (1112) includes aplurality of raised bumps (1124, 1126) that rub against each other asfiring bar (82) completes the firing stroke. More particularly, closuretrigger (20) has at least one raised bump (1126) that is configured tomove proximate to firing trigger (22) in the closed configuration. Theoperator then squeezes firing trigger (22) and the plurality of raisedbumps (1124) on firing trigger (22) frictionally rub against the atleast one raised bump (1126) to generate a vibration along closuretrigger (22). In one example, the plurality of bumps (1124, 1126) ispositioned to generate vibration indicative of complete firing of firingbar (82). However, it will be appreciated that the plurality of raisedbumps (1124, 1126) may be alternatively positioned on alternativestructures to generate tactile feedback indicative of otherconfigurations that may be desirable to the operator.

III. Exemplary Surgical Stapling Instruments with Alternative EndEffectors

While the above surgical stapling instrument (10) provides one exampleof end effector (16) projecting distally from handle assembly (12), itwill be appreciated that the operator may desire an alternative endeffector depending on one of a variety particular treatments. Forexample, end effector (16) may be used for stapling and severing colontissue within the pelvic bowl of the patient, such as in a LARprocedure. While accessing such tissue may be possible with end effector(16), positioning end effector (16) at a specific location to formstaples and sever the tissue at a particularly desirable location may bedifficult due to limited visibility in this region of the patient; anddue to inconsistencies between the geometry of end effector (16) and thegeometry of the anatomical structures in the pelvic bowl. The operatormay thus position end effector (16) relative to the pelvis, which may besimpler to locate, in order to position end effector (16) in thedesirable position relative to the colon. It may therefore be desirableto provide surgical stapling instrument (310) with an end effector (316)that is configured to rest predictably in the bowl of the pelvis forpositioning end effector (316) relative to adjacent colon tissue forstapling and severing the tissue with greater accuracy and precision.

Various tissues may be more or less difficult to treat depending on sizeand/or density within the patient. Despite the operator properlypositioning end effector (16) relative to tissue for accurately andprecisely stapling and severing the tissue, thicker and/or densertissues often require added force to be transmitted along surgicalstapling instrument (10) and, in turn, may cause one or more componentsof instrument (10) to deform during use. For example, compressing aportion of the colon between anvil (26) and cartridge (28) in the closedconfiguration may deform supporting structure (128) of end effector(16), particularly as the tissue is stapled and severed. Thus, theparticular location in which the staples form and the knife (32) cutsmay vary or deviate a small, but relatively meaningful, amount that maynegatively impact the effectiveness of the treatment. It may thereforebe desirable to provide surgical stapling instrument (310) with endeffector (316) having a supporting structure (328) that is configured toreduce deformation within end effector (316) during treatment. By way ofexample, end effector (316) may have supporting structure (448)configured to cooperate with one or both of exemplary guide andretaining pins (466, 330) for providing greater structural rigidityduring use for reducing deformation within end effector (316); andfurther increasing the accuracy and precision of the treatment. It maybe further desirable to provide an end effector (316, 616, 916, 1216,1416, 1616) with one of a variety of retaining pins (330, 630, 930,1230, 1430, 1630) shown and described herein.

While reducing deflection or deformation of end effector (16) by one ormore structural modifications may increase accuracy and precision toimprove treatment, it will be appreciated that some deflection ordeformation may remain or even be desirable in some instances. In turn,rather than reduce deflection or deformation, end effector (16) may beaugmented to accommodate such deflection or deformation. For example,staples may be driven to differing depths to correspondingly offset suchdeflection or deformation such that the staples are arranged moreuniformly in the tissue of the patient. Alternatively, staples may bedriven non-uniformly to differing depths to accommodate alternativestaples of varying size or even to position the staples at varyingdepths within the patient as determined by the operator. It maytherefore be desirable to provide surgical stapling instrument (310)with a staple driver assembly (440, 740, 1040) that is configured tooffset deflection or deformation for uniformity; or provide varyingdesirable staple depths for one of any variety of patterns fornon-uniformity, as discussed below.

End effectors (316, 616, 916, 1216, 1416, 1616) are described below inthe context of a proctocolectomy surgical procedure. While the followingdescription of end effectors (316, 616, 916, 1216, 1416, 1616) andmethods of treatment is provided in the context of stapling and/orcutting colon tissue, it will be appreciated that surgical staplinginstrument (310) and any of end effectors (316, 616, 916, 1216, 1416,1616) may be alternatively configured to treat any tissue in the humanbody with similar features. It should also be understood that thefeatures discussed below may be readily incorporated into surgicalstapling instrument (10) discussed above. To this end, like numbersindicate like features described above in greater detail.

A. Exemplary End Effector with Arcuate Distal Surface

FIG. 32 shows exemplary end effector (316) extending distally from shaftassembly (314) of surgical stapling instrument (310) as shown in FIGS.11-12. With respect to FIG. 32, end effector (316) includes a distal endportion (564) that is configured to cooperatively engage the pelvic bowlsuch that cartridge (328) and anvil (26) align in a predeterminedorientation with respect to the colon in to receive the colon andperform a lower anterior resection (LAR) of the colon. Distal endportion (564) more particularly includes a C-shaped profile as viewed inFIG. 33 having an arcuate distal surface (566) extending continuouslyfrom transverse ends, such as a lower half-dome (567) to an upper halfdome (568). The C-shaped profile of exemplary end effector (316) has aninner radius of curvature between approximately 1.0 inch andapproximately 1.2 inches and an outer radius of curvature of betweenapproximately 1.3 inches and approximately 1.6 inches. Moreparticularly, the inner radius of curvature is approximately 1.1 inches,and the outer radius of curvature is approximately 1.5 inches. Arcuatedistal surface (566) defines a distal crest (569) that is laterallyoffset from lower and upper half-domes (567, 568), as shown in FIG. 33.With respect to FIGS. 34-35, distal crest (569) is approximately midwaybetween lower and upper half-domes (567, 568) in a transverse directionand is distally offset from lower and upper half-domes (567, 568) with aradius of curvature shown in FIG. 35 between half-domes (567, 568) thatis between approximately 1.5 inches and approximately 3.0 inches. Moreparticularly, the radius of curvature of distal crest (569) isapproximately 2.0 inches. The exemplary curvature between half-domes(567, 568), which includes distal crest (569), is a compound curvature.To this end, the radius of curvature of distal crest (569) transitionsto the curvatures of half-domes (567, 568) allowing distal end portion(564) to be flatter, such as the radius of curvature of distal crest(569) being approximately 3.0 inches, or more pointed, such as theradius of curvature of distal crest (569) being approximately 1.5inches.

As noted above, arcuate distal surface (566) is generally continuous andsmooth for fitting stably in the pelvic bowl as the operator appliesforce against the pelvic bowl with the arcuate distal surface (566).FIGS. 36-38 illustrate transverse cross-sections taken from the innerradius to the outer radius adjacent to the lower half-dome (567),through distal crest (569), and adjacent to upper half-dome (568),respectively. In each instance shown, arcuate distal surface (566) has agenerally equivalent transverse profile. While arcuate distal surface(566) of end effector (316) is particularly keyed to be received againstthe pelvic bowl for performing the lower anterior resection (LAR), itwill be appreciated that various alternative crests, curves, and shapesmay be desirable for alternatively locating end effector (316) relativeto the colon or other anatomical structures. Thus, the surgical staplinginstrument (310) is not intended to be unnecessarily limited to arcuatedistal surface (566) and may be configured for alternative treatmentsand/or alternative tissues.

B. Exemplary End Effector with Structural Guide Pin

As shown in FIGS. 39-41, end effector (316) has a structural guide pin(466) configured to receive tissue thereagainst for inhibiting lateralpositioning of tissue beyond cartridge (28) and anvil (26) and guidemovement of cartridge (332) from the closed configuration toward theopen configuration as discussed above. In addition, structural guide pin(466) also rigidifies distal end portion (564), which receives anvil(26). Structural guide pin (446) extends through hole (162) in cartridge(328) and is configured to guide longitudinal movement of cartridge(328) between distal and proximal positions as discussed above ingreater detail with respect to surgical stapling instrument (10) (seeFIGS. 1A-1D). In addition, structural guide pin (466) extends fromdistal end portion (564) of supporting structure (448) and into aproximal end portion (571) to traverse the opening between anvil (26)and cartridge (328), providing structural rigidity therealong to inhibitdistal end portion (564) from deflecting relative to proximal endportion (571) during treatment.

As shown in FIGS. 40 and 41, structural guide pin (466) of the presentexample is in the form of a threaded fastener having a distal head end(466 a) and a proximal threaded end (466 b). Supporting structure (448)has a distal pin bore (572) positioned offset from a proximal pin bore(573) such that distal and proximal pin bores (572, 573) receivestructural guide pin (466) from the distal direction. Distal pin bore(572) is thus configured such that distal head end (466 a) seatstherein; whereas proximal pin bore (572) receives a threaded nut (574)seated opposite the distal head end (466 a). Proximal threaded end (466b) rotatably threads into threaded nut (574) such that structural guidepin (466) is held in tension between pin bores (572, 573) as shown inFIG. 41.

In use, structural guide pin (466) receives tissue thereagainst andguides cartridge (328) between open and closed configurations asdiscussed above and shown in FIGS. 1A and 1C, respectively. In addition,structural guide pin (466) braces supporting structure (448) in tensionbetween distal and proximal end portions (564, 571) as tissue iscompressed between anvil (26) and cartridge (328). In other words,structural guide pin (466) rigidifies supporting structure (448) toinhibit distal end portion (564) from deflecting relative to proximalend portion (571) of end effector (316). For example, structural guidepin (466) also inhibits distal end portion (564) from deflectingrelative to proximal end portion (571) as staples are pressed intostaple-forming surface (138) of anvil (26) from cartridge (328) forimproved accuracy and precision of staple formation and tissue severing.

C. Exemplary Surgical Stapling Instrument with Lockable Retaining PinMechanism

A lock retaining pin (330) is configured to translate from an openposition to a locked closed position as shown in FIGS. 42-47C. FIG. 42shows end effector (316) with cartridge (328) loaded therein in the openconfiguration for receiving tissue within gap (25) as discussed above ingreater detail. Cartridge (328) has a retaining pin mechanism (337),which includes lock retaining pin (330) connected to push rod (50) viacouplet (170). Slide (18) (see FIG. 1A and FIG. 2A) selectively directsmovement of push rod (50) distally from the open configuration to theclosed configuration for capturing tissue, such as colon tissue forperforming a lower anterior resection (LAR). To this end, lock retainingpin (330) is generally driven distally from within arm (176) ofcartridge (328) to distal end portion (564) similar to retaining pin(30) discussed above in greater detail with respect to FIGS. 1A-1B andFIGS. 7A-7B. However, it will be appreciated that alternative mechanismsfor moving lock retaining pin (330), such as by rotation and/ortranslation, may be used in accordance with principles discussed herein.

1. Exemplary Knife Lock Retaining Pin and Ledge Lock

Knife lock retaining pin (330) extends through arm (176) (see FIG. 6) ofcartridge (328) in the open configuration shown in FIG. 42. Cartridgehousing (132) (see FIG. 6) has been removed for clarity and improvedvisibility of knife lock retaining pin (330). With respect to FIGS.42-44, knife lock retaining pin (330) includes longitudinally extendingslot (182) through which knife lock retaining pin (330) receives andguides upper lateral end (186) of knife (32) between closed and openconfigurations. Slot (182) extends transversely through a portion ofknife lock retaining pin (330) such that slot (182) does not extendentirely transversely therethrough. Knife lock retaining pin (330)further includes an expansion slot (483), generally thinner than slot(182), that extends longitudinally from an intermediate pin portion(576) of knife lock retaining pin (330) through a distal end portion(577) of knife lock retaining pin (330). Expansion slot (483) extendsentirely transversely through knife retaining pin (330) in one examplefrom intermediate pin portion (576) through distal end portion (577) inorder to bisect distal end portion (577) into two resilient extensions(578). Each resilient extension (578) of distal end portion (577) isannularly recessed to define a distal head (579) having a proximalannular ledge (580). As shown in FIG. 47A, extension slot (483)longitudinally intersects slot (182) to define offset shoulders (581)within distal end portion (577) on each respective resilient extension(578). Knife (32) has a transverse depth (see FIG. 47B) greater thanexpansion slot (483) such that knife (32) moving distally through slot(182) is configured to engage shoulders (581) and wedge betweenresilient extensions (578) away from knife (32). Thereby distal head(483) resiliently expands from a contracted state to an expanded state.

With further respect to FIG. 47A, distal end portion (564) of endeffector (316) includes a longitudinally extending retaining pin bore(582) that is configured to receive distal head (579) of knife lockretaining pin (330) in the contracted state. Retaining pin bore (582)has a distal portion with a larger diameter to define a distal annularledge (584). Distal annular ledge (584) is sized such that the lowerportion of retaining pin bore (582) is smaller in diameter than distalhead (579) in the expanded state. Thus, in the expanded state, proximalannular ledge (580) of distal head (579) overlaps with distal annularledge (584) within retaining pin bore (582) to inhibit deflection ofdistal end portion (564) of end effector (316) relative to knife lockretaining pin (330). In other words, expansion of distal head (579)within retaining pin bore (582) positions knife lock retaining pin (330)in the locked closed position.

FIGS. 47A-47C illustrate knife lock guide pin (330) locking from anunlocked closed position to the locked closed position. FIG. 47A showsknife lock guide pin (330) in the unlocked closed position followingdistal movement directed by slide (18) (see FIG. 1A and FIG. 2A) ofretaining pin actuation mechanism (337). With tissue (not shown)captured between cartridge (328) and anvil (26), cartridge (328) andknife (32) contained therein are directed toward distal end portion(564) of end effector (316). Knife (32) continues distally such thatknife (32) engages shoulders (581) to wedge between resilient extensions(578) and expand distal head (579) outwardly from the contracted stateto the expanded state. Thereby, distal head (579) is effectivelycaptured in distal portion of retaining pin bore (582) as shown in FIG.47C. Distal annular ledge (584) of retaining pin bore (582) may thenengage proximal annular ledge (580) of knife lock retaining pin (330) toinhibit deflection of distal end portion (564) of end effector (316) ascartridge (328) and tissue are compressed against anvil (26). Whileknife lock guide pin (330) is expanded via knife (32) in the presentexample and effectively braces distal end portion (564) in tension, itwill be appreciated that alternative structures may expand alternativeguide pins; or may otherwise lock with distal end portion (564) suchthat alternative guide pins may brace distal end portion (564) incompression, as well. To this end, the invention described herein is notintended to be unnecessarily limited to exemplary knife lock guide pin(330).

2. Exemplary Rod lock Retaining Pin and Ledge Lock

FIG. 48 shows an exemplary alternative end effector (616), where a rodlock retaining pin (630) extends through arm (176) (see FIG. 6) of acartridge (628) in the open configuration. Cartridge housing (132) (seeFIG. 6) has been removed for clarity and improved visibility of rod lockretaining pin (630). As shown in FIGS. 48-50, rod lock retaining pin(630) includes longitudinally extending slot (182) through which rodlock retaining pin (630) receives and guides upper lateral end (186) ofknife (32) between closed and open configurations. Slot (182) extendstransversely through a portion of rod lock retaining pin (630) such thatslot (182) does not extend entirely transversely therethrough. Rod lockretaining pin (630) further includes expansion slot (483), which isgenerally thinner than slot (182), that extends longitudinally from anintermediate pin portion (576) of rod lock retaining pin (630) throughdistal end portion (577) of rod lock retaining pin (630) as discussedabove with two resilient extensions (578) and distal head (579).

A retaining pin actuation mechanism (637) further includes a closure rod(886) that is configured to translatably extend through rod lockretaining pin (630) to selectively direct distal head (579) betweencontracted and expanded states independent of the position of knife(32). Rod lock retaining pin (630) includes an elongate aperture (888)that extends coaxially through rod lock retaining pin (630), which isconfigured to receive closure rod (886) such that closure rod (886) mayslide longitudinally back and forth within rod lock retaining pin (630).For example, sliding closure rod (886) distally through rod lockretaining pin (630) causes closure rod (886) to engage shoulders (581)(see FIG. 53A) for expanding distal head (579) to the expanded positionfor locking with distal end portion (564) of end effector (616).

FIGS. 51 and 52 show retaining pin actuation mechanism (637) in theclosed configuration. With respect to FIG. 52, slot (182) in rod lockretaining pin (630) slidably receives upper lateral end (186) of knife(32) proximate to closure rod (886) slidably received within elongateaperture (888). Closure rod (886) may thus be selectively translatedindependently of knife (32) such that closure rod (886) may be locked orunlocked from distal end portion (564) of end effector (616) (see FIG.51) regardless of the position of knife (32). It will be appreciatedthat closure rod (886) may be operatively connected to handle and shaftassemblies (612, 614) so that the operator may selectively directmovement of closure rod (886), such as by mechanisms similar to slide(18) (see FIG. 1A). Alternatively, closure rod (886) may have a free endthat is configured to be gripped by the operator and manipulated formoving closure rod (886). It will be further appreciated that closurerod (886) may be rigid or flexible so long as closure rod (886) isconfigured to expand distal head (579) (see FIG. 50) for use. Varioussuitable alternative mechanisms that may be used to drive movement ofclosure rod (886) will be apparent to those of ordinary skill in the artin view of the teachings herein.

FIGS. 53A-53B illustrate rod lock guide pin (630) locking from anunlocked closed position to the locked closed position. FIG. 53A showsknife lock guide pin (630) in the unlocked closed position followingdistal movement directed by slide (18) (see FIG. 1A and FIG. 2A) ofretaining pin actuation mechanism (637). Regardless of whether or notcartridge (628) and knife (32) have already been moved distally towardanvil (26), the operator selectively translates closure rod (886)distally through elongate aperture (888). Closure rod (886) continuesdistally such that closure rod (886) engages shoulders (581) to wedgebetween resilient extensions (578) and expand distal head (579)outwardly from the contracted state to the expanded state. Thereby,distal head (579) is effectively captured in distal portion of retainingpin bore (582) as shown in FIG. 53B. Distal annular ledge (584) ofretaining pin bore (582) may then engage proximal annular ledge (580) ofrod lock retaining pin (630) to inhibit deflection of distal end portion(564) of end effector (616) as cartridge (628) (see FIG. 51) and tissueare compressed against anvil (26). While exemplary rod lock guide pin(630) is expanded via closure rod (886) in the present example andeffectively braces distal end portion (564) in tension, it will beappreciated that alternative structures may expand alternative guidepins; or may otherwise lock with distal end portion (564) such thatalternative guide pins may brace distal end portion (564) incompression, as well. To this end, the invention described herein is notintended to be unnecessarily limited to exemplary rod lock guide pin(630).

3. Exemplary Cam Lock Retaining Pin with Cartridge Cam Mechanism andLedge Lock

FIG. 54A shows another exemplary alternative end effector (916), where acam lock retaining pin (930) extends through arm (1076) of a cartridge(928) translating from the open configuration toward the closedconfiguration. As shown in FIGS. 54A-54B, a retaining pin actuationmechanism (937) includes cam lock retaining pin (930) extending directlyfrom a push rod (950) without coupling via couplet (170) (see FIG. 42).Alternatively, cam lock retaining pin (930) may be connected to couplet(170) and push rod (50) for actuation via slide (18) (see FIGS. 1A and2A) as discussed above in greater detail.

Retaining pin actuation mechanism (937) further includes a cam mechanism(1190) that is configured to guide rotation of cam lock retaining pin(930) as cam lock retaining pin (930) translates into the locked closedposition to simultaneously lock and close cam lock retaining pin (930)with distal end portion (1164) of end effector (916). More particularly,cam mechanism (1190) includes a cam tab (1191) extending transverselyfrom cam lock retaining pin (930) and a cam slot (1192) in cartridgehousing (132) of cartridge (928). Cam tab (1191) is slidably receivedwithin cam slot (1192), which has a proximal linear portion (1193)extending to a distal arcuate portion (1194). Cam slot (1192) isconfigured to guide rotational movement of cam tab (1191) and, in turn,rotational movement of cam lock retaining pin (930) as push rod (950)distally pushes cam lock retaining pin (930) to distal end portion(1164) of end effector (916) for locking cam lock retaining pin (930) todistal end portion (1164) of end effector (916).

A distal head (1179) of cam lock retaining pin (930) is configured to betranslatably and rotatably received within a retaining pin bore (1182)of distal end portion (1164) and secured thereto as shown in FIG. 55.Distal head (1179) of cam lock retaining pin (930) defines a proximaloblong ledge (1180), whereas retaining pin bore (1182) is generallyoblong in shape to define a distal oblong ledge (1184) (see FIG. 56A).Proximal oblong ledge (1180) is effectively keyed to retaining pin bore(1182) such that as distal head (1179) is configured to translatethrough retaining pin bore (1182) and then rotate. Proximal oblong ledge(1180) then engages distal oblong ledge (1184). Distal head (1179) isthereby configured to rotatably lock within retaining pin bore (1182) tothe closed locked position. While retaining pin bore (1182) and ledge(1180) are oblong in shape so as to overlap when rotated in the presentexample, it will be appreciated that alternative non-circular shapes maybe similarly rotated relative to each other to achieve similarlyoverlapping and engaging surfaces. For example, such shapes may include,but are not limited to rounded shapes, polygonal shapes, or anycombination thereof.

In use, the operator selectively directs push rod (950) distally suchthat cam slot (1192) guides cam tab (1191) linearly through proximallinear portion (1193) of cam slot (1192) as shown in FIG. 54A and FIG.55. Cam lock retaining pin (930) thus slides distally toward retainingpin bore (1180) for capturing tissue (not shown) between cartridge (928)and anvil (26) in the unlocked closed configuration. As distal head(1179) is introduced into the proximal portion of retaining pin bore(1182) as shown in FIG. 54B, cam tab (1191) slides into distal arcuateportion (1194), which, in turn, causes cam lock retaining pin to rotatein the distal portion of retaining pin bore (1182). Proximal oblong edge(1180) follows by rotating to overlap with distal oblong edge (1184).Thereby, distal head (1179) is effectively captured in distal portion ofretaining pin bore (1182) as shown in FIGS. 54B-55. Distal oblong ledge(1184) of retaining pin bore (1182) may then engage proximal oblongledge (1180) of cam lock retaining pin (930) to inhibit deflection ofdistal end portion (1164) of end effector (916) as cartridge (928) andtissue are compressed against anvil (26). While cam lock guide pin (930)effectively braces distal end portion (1164) in tension in the presentexample, it will be appreciated that alternative structures may expandalternative guide pins; or may otherwise lock with distal end portion(1164) such that alternative guide pins may brace distal end portion(1164) in compression, as well. To this end, the invention describedherein is not intended to be unnecessarily limited to exemplary cam lockguide pin (930).

4. Exemplary Cam Lock Retaining Pin with Pin Cam Mechanism and LedgeLock

FIGS. 56A-56C show another exemplary alternative end effector (1216),where a cam lock retaining pin (1230) extends through arm (176) of acartridge (1228) translating from the open configuration toward theclosed configuration. A retaining pin actuation mechanism (1237)includes cam lock retaining pin (1230) rotatably resting on a supportcradle (1396) between opposing flanges (1397). In addition, a distal endportion of cam lock retaining pin (1230) is rotatably driven byretaining pin actuation mechanism (1237), which includes a cam tab(1391) extending from the distal end portion of cam lock retaining pin(1230) received within an arcuate cam slot (1392) of a cam tube (1398).

In use, cam lock retaining pin (1230) may be rotated independently ofits translation such that the operator may choose to move cam lockretaining pin (1230) to either open or closed configurations with orwithout the use of locking the cam lock retaining pin (1230) to thedistal end portion (1164) of end effector (1216). More particularly, theoperator slides cam lock retaining pin (1230) to the unlocked closedposition on support cradle (1396) as shown in FIG. 56B such that distalhead (1179) is received within retaining pin bore (1182) as discussedabove in greater detail. To lock cam lock retaining pin (1230), push rod(50) (see FIG. 1A), or some alternative pushing mechanism, urges camtube (1398) distally. Because arcuate cam slot (1392) is configured todirect cam tab (1391) to rotate, the entirety of cam lock retaining pin(1230) also rotates as cam tube (1398) moves distally. In turn, proximaloblong edge (1180) follows by rotating to overlap with distal oblongedge (1184). Thereby, distal head (1179) is effectively captured indistal portion of retaining pin bore (1182) as shown in FIG. 56C. Distaloblong ledge (1184) of retaining pin bore (1182) may then engageproximal oblong ledge (1180) of cam lock retaining pin (1230) to inhibitdeflection of distal end portion (1164) of end effector (1216) ascartridge (1228) and tissue are compressed against anvil (26). While camlock guide pin (1230) effectively braces distal end portion (1164) intension in the present example, it will be appreciated that alternativestructures may expand alternative guide pins; or may otherwise lock withdistal end portion (1164) such that alternative guide pins may bracedistal end portion (1164) in compression, as well. To this end, theinvention described herein is not intended to be unnecessarily limitedto exemplary cam lock guide pin (1230).

5. Exemplary Cam Lock Retaining Pin and Threaded Lock

FIGS. 57A-57B show another alternative end effector (1416) having a camlock retaining pin (1430) received on a support cradle (1396) betweenflanges (1397). Cam lock retaining pin (1430) includes a distal head(1579) having a plurality of outer threads (1600) configured tothreadably engage with a plurality of inner threads (1602) within aretaining pin bore (1582). Cam lock retaining pin (1430) is rotatablydriven distally from the open position to the locked closed position viaretaining pin actuation mechanism (1437). Retaining pin actuationmechanism (1437) includes a cam tab (1391) extending from the distal endportion of cam lock retaining pin (1430), which is received within aspiral cam slot (1592) of a cam tube (1598). Cam tube (1598) maintains afixed position relative to pin (1430). Thus, as support cradle (1396)pushes cam lock retaining pin (1430) distally, spiral cam slot (1592)directs cam tab (1391) to spiral through spiral cam slot (1592), causingcam lock retaining pin (1430) to simultaneously translate and rotate.The simultaneous translation and rotation continues until distal head(1579) fully threads into retaining pin bore (1582) and seats in theclosed locked position. Thus, cam lock retaining pin (1430) may brace adistal end portion (1564) of end effector (1416) in both tension andcompression due to the threaded engagement. It will be appreciated thatsupport cradle (1396) may be distally and proximally driven by anoperative connection with push rod (50) (see FIG. 1A) or some otheralternative mechanism. In any case, the invention described herein isnot intended to be unnecessarily limited to exemplary cam lock retainingpin (1430).

6. Exemplary Snap Lock Retaining Pin and Ledge Lock

FIGS. 58A-58C show another exemplary alternative end effector (1616)that includes a snap lock retaining pin (1630), which is configured tomove from the open position to the locked closed position with distalend portion (1764). A distal end portion (1777) of lock retaining pin(1630) has a distal head in the form of a resilient snap (1779) defininga proximal ledge (1780). In addition, a retaining pin bore (1782)defines a distal ledge (1784). Resilient snap (1779) is configured toresiliently bend about distal ledge (1784) and snap about distal ledge(1784) such that proximal ledge (1784) of resilient snap (1779) engagesdistal ledge (1784) within retaining pin bore (1782).

In use, a retaining pin actuation mechanism (1637) may include push rod(50) to direct snap lock retaining pin (1630) distally from the openposition toward retaining pin bore (1782) as shown in FIG. 58A. As shownin FIG. 58B, resilient snap (1779) is forced distally over distal ledge(1784) within retaining pin bore (1782) until proximal ledge (1784)slides over distal ledge (1784) for engagement thereagainst in thelocked closed position shown in FIG. 58C. While snap lock guide pin(1630) effectively braces distal end portion (1764) in tension in thepresent example, it will be appreciated that alternative structures mayexpand alternative guide pins; or may otherwise lock with distal endportion (1764) such that alternative guide pins may brace distal endportion (1764) in compression, as well. To this end, the inventiondescribed herein is not intended to be unnecessarily limited toexemplary snap lock guide pin (1630).

D. Exemplary End Effector with Variable Height Driver Assembly

FIGS. 59 and 60 show end effector (316) extending distally from shaftassembly (314) as discussed above in greater detail. Cartridge (328) hasbeen moved to the closed position for firing or actuating firing bar(82) distally to both form staples in the tissue with a driver assembly(440) and sever tissue with knife (32). With respect to stapleformation, driver assembly (440) has a plurality of staple drivers (441)extending distally from a driver base (595) below corresponding staplecontaining slots (136) (see FIGS. 8-9). Each driver (441) has a groove(596) extending along a distal driver surface (597). Each groove (596)is configured to cradle a respective staple thereon for forcing thestaple distally toward anvil (26) for formation. While driver assembly(440) has drivers (441) in a predetermined pattern with predeterminedheights for various staple formations, it will be appreciated thatalternative driver assemblies may be configured with other patterns orheights as contemplated herein to generate other desirable stapleformations in tissue as determined to be desirable by the operator. Suchpredetermined patterns and heights of drivers (441) may also be referredto herein as a predetermined variable height pattern.

Driver assembly (440) of the present example has four offset rows ofdrivers (441), which will be referred to below as a “front outer row,” a“front inner row,” a “back outer row,” and a “back inner row,” thatextend from a “left side” to a “right side.” The terms “front outerrow,” “front inner row,” “back outer row,” “back inner row,” are takenwith respect to FIG. 59 with like terms being similarly used to describealternative driver embodiments below. To this end, the terms “frontrow,” “back row,” “left side,” and “right side” are for relativereference and not intended to unnecessarily limit the inventiondescribed herein.

The following examples include driver assemblies with drivers that havedifferent heights (within the same driver assembly). Despite the factthat drivers within the same driver assembly have different heights inthis example, these drivers assemblies are configured to ultimatelyprovide formed staples in tissue having the same, uniform height. Inother words, for any of the driver assemblies described below, thestaples that are driven by the driver assembly will all have the sameformed height, despite the fact that the drivers within the assemblyhave different heights. Drivers that are relatively short within a givendriver assembly may have associated staples that are relatively tall.Conversely, drivers that are relatively tall within the same driverassembly may have associated staples that are relatively short. Thus,the unformed staple heights may vary based on variations in driverheight, to ultimately yield formed staple heights that are all uniform.This may be desirable to account for uneven load distribution across thelength and/or width of the staple driver, to account for variations intissue thickness, etc. Alternatively, these drivers may be configuredwith like of varying heights to similarly provide formed staples intissue having one or more varying, non-uniform height. Such variationmay be desirable to accommodate deflection, produce varying forms ofstaples, or some combination thereof.

1. Exemplary Arcuate Driver Assembly with Variable Height Drivers in aFirst Predetermined Pattern

Driver assembly (440) includes two pairs of offset rows of drivers (441)that are configured to direct two pairs of offset rows of staples intissue for fluidly sealing tissue and inhibit fluid, such as blood, fromleaking between the paired rows of staples. To this end, driver assembly(440) of FIG. 61 includes a front outer row (598 a) of driverspositioned proximate to a front inner row (598 b) on one side of slot(150) and a rear outer row (599 a) positioned proximate to a rear innerrow (599 b) on an opposing side of slot (150). Thereby, drivers (441)are configured to form cooperating staple rows in tissue on each side ofknife (32) (see FIG. 6) to fluidly seal the severed tissue on eachsevered end. In the present example, rows (598 a, 598 b, 599 a, 598 b)are arranged along a predetermined arcuate pattern having an innerradius of curvature of between approximately 1.0 inch and approximately1.2 inches and an outer radius of curvature of between approximately 1.3inches and approximately 1.5 inches. More particularly the inner radiusof curvature is approximately 1.1 inches, and the outer radius ofcurvature is approximately 1.4 inches. However, it will be appreciatedthat drivers (441) may be alternatively arranged in other variouspredetermined patterns, such as other another arcuate pattern, a linearpattern, or some combination thereof.

As shown in FIGS. 62-64, drivers (441) extend upwardly from driver base(595) with varying heights such that distal driver surfaces (597)collectively define a predetermined curvature that is configured todrive staples to various depths and/or offset a predetermined deflectionrelative to anvil (26) (see FIG. 60). Such predetermined curvature mayextend in one dimension, two dimensions, or three dimensions alongdistal driver surfaces (597) of driver assembly (440). In other words,at least one driver (441) has a height larger or smaller than anotherdriver (441).

For example, FIGS. 62-64 illustrate a reference plane (600) to moreclearly show height differences among drivers (441). FIG. 62 shows aright side of driver assembly (440) having front outer and inner rows(598 a, 598 b) with a height that is greater than the heights of rearinner and outer rows (599 b, 599 a). More particularly, the varyingheight of drivers (441) tends to taper down from front outer row (598 a)toward rear outer row (599 a). As shown in FIGS. 63-64, each row (598 a,598 b, 599 a, 598 b) of drivers (441) is configured with relativelylarger drivers (441) to the left and right sides and relatively smallerdrivers (441) in the middle between the left and right sides. Rows (598a, 598 b, 599 a, 598 b) thus taper down from the left and right sidestoward the middle.

2. Exemplary Arcuate Driver Assembly with Variable Height Drivers in aSecond Predetermined Pattern

Another exemplary driver assembly (740) shown in FIG. 65 includes twopairs of offset rows of drivers (741) that are configured to direct twopairs of offset rows of staples in tissue for fluidly sealing tissue andinhibit fluid, such as blood, from leaking between the paired rows ofstaples. To this end, driver assembly (740) of FIG. 65 includes a frontouter row (898 a) of drivers (741) that is positioned proximate to afront inner row (898 b) on one side of slot (150); and a rear outer row(899 a) that is positioned proximate to a rear inner row (899 b) on anopposing side of slot (150). Drivers (741) are thereby configured toform cooperating staple rows in tissue on each side of knife (32) (seeFIG. 6) to fluidly seal the severed tissue on each severed end. In thepresent example, rows (898 a, 898 b, 899 a, 898 b) are arranged along apredetermined arcuate pattern having an inner radius of curvature ofbetween approximately 1.0 inch and approximately 1.2 inches and an outerradius of curvature of between approximately 1.3 inches andapproximately 1.5 inches. More particularly the inner radius ofcurvature is approximately 1.1 inches, and the outer radius of curvatureis approximately 1.4 inches. However, it will be appreciated thatdrivers (741) may be alternatively arranged in other variouspredetermined patterns, such as another arcuate pattern, a linearpattern, or some combination thereof.

As shown in FIGS. 66-68, drivers (741) extend upwardly from driver base(895) with varying heights such that distal driver surfaces (897)collectively define a predetermined curvature that is configured todrive staples to various depths and/or offset a predetermined deflectionrelative to anvil (26) (see FIG. 60). Such predetermined curvature mayextend in one dimension, two dimensions, or three dimensions alongdistal driver surfaces (897) of driver assembly (740). In other words,at least one driver (741) has a height larger or smaller than anotherdriver (741).

For example, FIGS. 66-68 illustrate a reference plane (900) to moreclearly show height differences among drivers (741). FIG. 66 shows aright side of driver assembly (840) having front outer and inner rows(898 a, 898 b) with a height that is greater than the heights of rearinner and outer rows (899 b, 899 a). More particularly, the varyingheight of drivers (741) tends to taper down from front outer row (898 a)toward rear outer row (899 a). As shown in FIGS. 67-68, each row (898 a,898 b, 899 a, 898 b) of drivers (741) has a generally uniform heightfrom the left side to the right side despite having varying heights fromfront to rear.

3. Exemplary Linear Driver Assembly with Variable Height Drivers in aThird Predetermined Pattern

Another exemplary driver assembly (1040) shown in FIG. 69 includes twopairs of offset rows of drivers (1041) that are configured to direct twopairs of offset rows of staples in tissue for fluidly sealing tissue andinhibit fluid, such as blood, from leaking between the paired rows ofstaples. To this end, driver assembly (1040) of FIG. 69 includes a frontouter row (1198 a) of drivers positioned proximate to a front inner row(1198 b) on one side of slot (not shown) and a rear outer row (1199 a)positioned proximate to a rear inner row (1199 b) on an opposing side ofslot (not shown). Drivers (1041) are thereby configured to formcooperating staple rows in tissue on each side of knife (32) (not shown)to fluidly seal the severed tissue on each severed end. In the presentexample, rows (1198 a, 1198 b, 1199 a, 1198 b) are arranged along apredetermined linear pattern. However, it will be appreciated thatdrivers (1041) may be alternatively arranged in other variouspredetermined patterns, such as another linear pattern, an arcuatepattern, or some combination thereof. It will be further appreciatedthat knife (not shown) and slot (not shown) may be configured to extendlinearly but function similarly to slot (150) and knife (32) as shown inFIG. 6 and discussed above in greater detail.

As shown in FIGS. 70-72, drivers (1041) extend upwardly from driver base(1195) with varying heights such that distal driver surfaces (1197)collectively define a predetermined curvature that is configured todrive staples to various depths and/or offset a predetermined deflectionrelative to anvil (not shown). Such predetermined curvature may extendin one dimension, two dimensions, or three dimensions along distaldriver surfaces (1197) of driver assembly (1040). In other words, atleast one driver (1141) has a height larger or smaller than anotherdriver (1141).

For example, FIGS. 70-72 illustrate a reference plane (1200) to moreclearly show height differences among drivers (1141). FIG. 70 shows aside of driver assembly (1040) having front outer and inner rows (1198a, 1198 b) and rear outer and inner rows (1199 a, 1199 b) with agenerally uniform height, respectively, from the front side to the rearside despite having varying heights from left to right. As shown inFIGS. 71-72, each row (1198 a, 1198 b, 1199 a, 1198 b) of drivers (1041)is generally larger on the right side, tapers down toward the middle,and remains uniform from the middle to the right side.

IV. Exemplary Combinations

The following examples relate to various non-exhaustive ways in whichthe teachings herein may be combined or applied. It should be understoodthat the following examples are not intended to restrict the coverage ofany claims that may be presented at any time in this application or insubsequent filings of this application. No disclaimer is intended. Thefollowing examples are being provided for nothing more than merelyillustrative purposes. It is contemplated that the various teachingsherein may be arranged and applied in numerous other ways. It is alsocontemplated that some variations may omit certain features referred toin the below examples. Therefore, none of the aspects or featuresreferred to below should be deemed critical unless otherwise explicitlyindicated as such at a later date by the inventors or by a successor ininterest to the inventors. If any claims are presented in thisapplication or in subsequent filings related to this application thatinclude additional features beyond those referred to below, thoseadditional features shall not be presumed to have been added for anyreason relating to patentability.

Example 1

A method of using an instrument to manipulate tissue of a patient,wherein the instrument has an end effector, the method comprising: (a)positioning the tissue within a gap between a cartridge and an anvil ofthe end effector, wherein the cartridge includes a knife and a pluralityof staples, wherein the anvil is located in a distal end portion of theend effector, and wherein the end effector is in an open configurationduring the act of positioning the tissue between the anvil and thecartridge; (b) positioning the tissue against a guide pin to laterallyposition the tissue relative to the cartridge and the anvil, (c) movinga retaining pin from an open position toward a closed position acrossthe gap, thereby capturing the tissue between the cartridge, the anvil,the guide pin, and the retaining pin; (d) moving the cartridge towardthe anvil such that the end effector is in a closed configuration; (e)inhibiting deflection of the distal end portion of the end effector foraligning the cartridge and the anvil, wherein at least one of the guidepin or the retaining pin connects to the distal end portion to securethe distal end portion relative to a proximal end portion of the endeffector to thereby inhibit deflection of the distal end portion of theend effector; (f) forming the plurality of staples within the tissue andfluidly sealing the tissue; and (g) cutting the tissue with the knife,thereby severing the tissue.

Example 2

The method of Example 1, wherein inhibiting deflection is provided bythe guide pin connected to the distal end portion and the proximal endportion to secure the distal end portion relative to the proximal endportion of the end effector.

Example 3

The method of any one or more of Examples 1 through 2, furthercomprising increasing tension in the guide pin such that guide pinfurther inhibits deflection of the distal end portion of the endeffector relative to the proximal end portion of the end effector.

Example 4

The method of any one or more of Examples 1 through 3, whereininhibiting deflection is provided by the retaining pin connected to thedistal end portion and the proximal end portion to secure the distal endportion relative to the proximal end portion of the end effector.

Example 5

The method of any one or more of Examples 1 through 4, furthercomprising locking the retaining pin to the distal end portion in alocked closed position.

Example 6

The method of Example 5, wherein the distal end portion includes a firstledge, the retaining pin includes a second ledge, and the method furthercomprises overlapping the second ledge with the first ledge to lock theretaining pin in the locked closed position.

Example 7

The method of any one or more of Examples 5 through 6, wherein lockingthe retaining pin further includes expanding a portion of the retainingpin within the distal end portion of the end effector.

Example 8

The method of Example 7, wherein expanding a portion of the retainingpin further includes sliding the knife toward the anvil such that theknife forces the portion of the retaining pin to expand.

Example 9

The method of Example 7, wherein expanding a portion of the retainingpin further includes sliding a closure rod through the retaining pintoward the distal end portion such that the closure rod forces theportion of the retaining pin to expand.

Example 10

The method of any one or more of Examples 5 through 9, wherein the endeffector includes a cam mechanism having a cam tab and a cam slot, andthe method further comprises guiding the cam tab through the cam slotand rotating the retaining pin therewith to the locked closed position.

Example 11

The method of any one or more of Examples 1 through 10, wherein theguide pin is rotatably supported in a support cradle, and the methodfurther comprises translating the support cradle and the retaining pintoward the distal end portion.

Example 12

The method of Example 5, wherein the distal end portion includes a firstplurality of threads, the retaining pin includes a second plurality ofthreads, and the method further comprises threading the second pluralityof threads with the first plurality of threads to lock the retaining pinin the locked closed position.

Example 13

The method of Example 12, wherein the end effector includes a cammechanism having a cam tab and a spiral cam slot, and the method furthercomprises guiding the cam tab through the spiral cam slot and rotatingthe retaining pin therewith to the locked closed position.

Example 14

The method of any one or more of Examples 1 through 13, wherein thecartridge includes a driver assembly and a plurality of staple slots,wherein the driver assembly has a plurality of drivers respectivelysupporting the plurality of staples thereon within the plurality ofstaple slots, wherein at least one driver of the plurality of drivershas a variable distal height relative to at least another driver of theplurality of drivers in a predetermined variable height pattern, and themethod further comprises directing the plurality of drivers with therespective plurality of staples toward the anvil in the predeterminedvariable height pattern.

Example 15

The method of Example 14, further comprising deflecting the distal endportion of end effector with the anvil relative to the plurality ofdrivers a predetermined deflection such that the predetermined variableheight pattern accommodates the predetermined deflection, and whereinforming the plurality of staples further includes uniformly forming theplurality of staples within the tissue.

Example 16

The method of Example 14, wherein forming the plurality of staplesfurther includes non-uniformly forming the plurality of staples withinthe tissue.

Example 17

The method of any one or more of Examples 1 through 16, wherein the endeffector is operatively attached to a body having a firing memberconfigured to selectively actuate a firing stroke and move the cartridgefrom an unfired cartridge position to a fired cartridge position forforming the plurality of staples and cutting the tissue, wherein themethod further comprises simultaneously communicating an audible soundand a visual indicia with a feedback generator to the operator toindicate that the firing member completed the firing stroke foractuating the cartridge to the fired cartridge position.

Example 18

The method of any one or more of Examples 1 through 17, wherein thetissue is a colon tissue, and the method further comprises performing alower anterior resection of the colon tissue.

Example 19

The method of Example 18, wherein the distal end portion of the endeffector includes, a first end, a second end laterally opposite from thefirst end, a distal crest laterally positioned between the first andsecond ends, wherein the distal crest projects distally beyond the firstand second ends; and an arcuate distal surface extending along thedistal crest and laterally between the first and second ends, whereinthe arcuate distal surface at the distal crest has a radius of curvatureconfigured to be received against a pelvic bowl of the patient toposition the end effector relative to the colon tissue of the patientfor manipulating the colon tissue with the cartridge, wherein the methodfurther comprises positioning the arcuate distal surface of the distalend portion of the end effector against the pelvic bowl such that theend effector is in a predetermined orientation relative to the colontissue thereby positioning the cartridge relative to the colon tissuefor performing the lower anterior resection of the colon tissue.

Example 20

A method of using an instrument to manipulate colon tissue of a patient,wherein the instrument has an end effector, the method comprising: (a)positioning the colon tissue within a gap between a cartridge and ananvil of an end effector, wherein the cartridge includes a knife and aplurality of staples, wherein the anvil is received within a distal endportion of the end effector, and wherein the end effector is in an openconfiguration during the act of positioning the colon tissue between theanvil and the cartridge; (b) positioning the colon tissue against aguide pin, (c) moving a retaining pin from an open position toward aclosed position across the gap, thereby capturing the colon tissuebetween the cartridge, the anvil, the guide pin, and the retaining pin;(d) moving the cartridge toward the anvil such that the end effector isin a closed configuration; (e) inhibiting deflection of the distal endportion of the end effector for aligning the cartridge and the anvil,wherein at least one of the guide pin and the retaining pin connects tothe distal end portion to secure the distal end portion relative to aproximal end portion of the end effector; (f) forming the plurality ofstaples within the colon tissue and fluidly sealing the colon tissue;and (g) cutting the colon tissue with the knife, thereby providing alower anterior resection of the colon tissue.

Example 21

A surgical instrument comprising: (a) a body; (b) a shaft assemblyextending distally from the body; and (c) an end effector extendingdistally from the shaft assembly and configured to receive a cartridgefor manipulating tissue of a patient, the end effector including: (i) adistal end portion, (ii) a proximal end portion, (iii) a gap between thedistal end portion and the proximal end portion, and (iv) a retainingpin having a distal head, wherein the retaining pin is selectivelymovable from an open position to a locked closed position, wherein theretaining pin in the open position is proximally positioned relative tothe gap such that the gap is configured to receive the tissue, whereinthe retaining pin in the locked closed position extends across the gapsuch that retaining pin is configured to capture the tissue within thegap, wherein the distal head of the retaining pin is configured engagethe distal end portion of the end effector and secure the distal endportion of the end effector relative to the proximal end portion of theend effector via the retaining pin projecting therebetween.

Example 22

The surgical instrument of Example 21, further comprising a cartridgehaving a cartridge housing, wherein the retaining pin is at leastpartially contained within the cartridge housing in the open position.

Example 23

The surgical instrument of Example 22, wherein the cartridge includes atleast one of a knife or a plurality of staples, wherein the knife isconfigured to cut the tissue, and wherein the plurality of staples areconfigured to fasten the tissue.

Example 24

The surgical instrument of any one or more of Examples 21 through 23,wherein the distal end portion of the end effector includes a boreconfigured to receive the distal head of the retaining pin in the lockedclosed position.

Example 25

The surgical instrument of Example 24, wherein the distal end portion ofthe end effector has a first ledge within the bore, wherein the distalhead of the retaining pin has a second ledge, wherein the second ledgeis configured to overlap within the first ledge to lock distal head ofthe retaining pin to the distal end portion of the end effector.

Example 26

The surgical instrument of Example 25, wherein the distal head of theretaining pin is configured to expand from a contracted state to anexpanded state for overlapping the first and second ledges.

Example 27

The surgical instrument of Example 26, wherein the end effector furtherincludes a knife configured to move from a proximal knife positiontoward a distal knife position, wherein at least a portion of the knifeis slidably received within the retaining pin, wherein the knife isconfigured to expand the distal head from the contracted state to theexpanded state when the knife is moved from the proximal knife positiontoward the distal knife position.

Example 28

The surgical instrument of Example 27, wherein the knife is configuredto move from the distal knife position toward the proximal knifeposition, and wherein the knife is configured to contract the distalhead from the expanded state to the contracted state and unlock thedistal head of the retaining pin from the distal end portion of the endeffector when the knife is moved from the distal knife position towardthe proximal knife position.

Example 29

The surgical instrument of Example 26, wherein the end effector furtherincludes a closure member configured to move from a proximal memberposition toward a distal member position, wherein the closure member isslidably received within the retaining pin, wherein the closure memberis configured to expand the distal head from the contracted state to theexpanded state when the closure member is moved from the proximal memberposition toward the distal member position.

Example 30

The surgical instrument of Example 29, wherein the closure member isconfigured to move from the distal member position toward the proximalmember position, and wherein the closure member is configured tocontract the distal head from the expanded state to the contracted stateand unlock the distal head of the retaining pin from the distal endportion of the end effector when the closure member is moved from thedistal member position toward the proximal member position.

Example 31

The surgical instrument of Example 25, wherein the end effector includesa cam mechanism having a cam tab and a cam slot, wherein the cam tabextends from the retaining pin within the cam slot, and wherein the camslot is configured to guide movement of the retaining pin such that thesecond ledge rotatably overlaps with the first ledge into the lockedclosed position.

Example 32

The surgical instrument of Example 31, further comprising a cartridgehaving a cartridge housing, wherein the cam slot is defined by thecartridge housing.

Example 33

The surgical instrument of Example 31, wherein the cam slot is definedby a cam tube, and wherein the retaining pin is received within the camtube.

Example 34

The surgical instrument of Example 24, wherein the distal end portion ofthe end effector has a first plurality of threads within the bore, thedistal head of the retaining pin has a second plurality of threads, andthe second plurality of threads is configure to threadably engage thefirst plurality of threads to lock the distal head of the retaining pinto the distal end portion of the end effector.

Example 35

The surgical instrument of Example 34, wherein the end effector includesa cam mechanism having a cam tab and a spiral cam slot, wherein the camtab extends from the retaining pin within the spiral cam slot, andwherein the spiral cam slot is configured to guide movement of theretaining pin such that the second plurality of threads is rotatablydriven into engagement with the first plurality of threads into thelocked closed position.

Example 36

The surgical instrument of Example 24, wherein the distal head of theretaining pin includes a resilient snap, wherein the distal end portionof the end effector has a first ledge within the bore, wherein theresilient snap of the retaining pin has a second ledge, wherein thesecond ledge is configured to overlap within the first ledge to lockdistal head of the retaining pin to the distal end portion of the endeffector.

Example 37

A cartridge for an end effector of a surgical instrument, wherein theend effector has a distal end portion, a proximal end portion, and a gaptherebetween for receiving the tissue, the cartridge comprising: (a) acartridge housing configured to be received by the end effector, whereinthe cartridge housing contains at least one of a knife or a plurality ofstaples, wherein the knife is configured to cut tissue, and wherein theplurality of staples are configured to fasten tissue; and (b) aretaining pin having a distal head, wherein the retaining pin isselectively movable from an open position to a locked closed position,wherein the retaining pin in the open position is configured to beproximally positioned relative to the gap for receiving tissue, whereinthe retaining pin in the locked closed position is configured to extendacross the gap such that retaining pin is configured to capture tissuewithin the gap, wherein the retaining pin is configured engage thedistal end portion of the end effector and secure the distal end portionof the end effector relative to the proximal end portion of the endeffector.

Example 38

The cartridge of Example 37, wherein the retaining pin is at leastpartially contained within the cartridge housing in the open position.

Example 39

A method of manipulating tissue of a patient with a surgical instrument,wherein the surgical instrument includes a body, a shaft assemblyextending distally from the body, and an end effector extending distallyfrom the shaft assembly, wherein the end effector includes a cartridgeconfigured to manipulate the tissue, a distal end portion, a proximalend portion, a gap between the distal and proximal end portionsconfigured to receive the tissue, and a retaining pin, the methodcomprising: (a) positioning the tissue within the gap; (b) moving theretaining pin from an open position toward a locked closed position tocapture the tissue within the gap; (c) engaging a distal head of theretaining pin with the distal end portion of the end effector in thelocked closed position to secure the distal end portion of the endeffector relative to the proximal end portion of the end effector; and(d) manipulating the tissue of the patient with the cartridge.

Example 40

The method of Example 39, further comprising inhibiting deflection ofthe distal end portion of the end effector with the retaining pin in thelocked closed position.

Example 41

A surgical instrument comprising: (a) a body having a firing mechanismconfigured to be selectively manipulated by an operator; (b) a shaftassembly extending distally from the body; and (c) an end effectorextending distally from the shaft assembly and configured to receive acartridge for manipulating tissue of a patient, the end effectorincluding: (i) a distal end portion, (ii) a proximal end portion, (iii)a gap between the distal end portion and the proximal end portion, and(iv) a guide pin extending from the distal end portion to the proximalportion, wherein the guide pin is configured to receive the tissuethereagainst for positioning tissue within the gap, wherein the guidepin is connected to each of the distal and proximal end portions tosecure the distal end portion relative to the proximal end portion andinhibit deflection of the distal end portion relative to the proximalend portion.

Example 42

The surgical instrument of Example 41, wherein the distal end portionextends distally from the proximal end portion in the form of ahook-shape supporting structure with the gap therebetween configured toreceive the tissue.

Example 43

The surgical instrument of any one or more of Examples 41 through 42,wherein the guide pin is connected to each of the distal and proximalend portions in tension to secure the distal end portion relative to theproximal end portion.

Example 44

The surgical instrument of any one or more of Examples 41 through 43,wherein the guide pin is in the form of a threaded fastener.

Example 45

The surgical instrument of any one or more of Examples 41 through 44,wherein the distal end portion has a distal pin bore and the proximalend portion has a proximal pin bore, wherein the distal and proximal pinbores are positioned opposite each other and receive the guide pintherein.

Example 46

The surgical instrument of Example 45, wherein the proximal pin boreincludes a threaded nut, and wherein the guide pin is threaded into thethreaded nut to be connected therein.

Example 47

The surgical instrument of Example 46, wherein the guide pin is in theform of a threaded fastener.

Example 48

The surgical instrument of any one or more of Examples 44 through 47,wherein the threaded fastener is connected to each of the distal andproximal end portions in tension to secure the distal end portionrelative to the proximal end portion.

Example 49

The surgical instrument of any one or more of Examples 41 through 48,further comprising a cartridge received against the guide pin, whereinthe cartridge is configured to be guided from the proximal end portiontoward the distal end portion along the guide pin.

Example 50

The surgical instrument of Example 49, wherein the cartridge includes atleast one of a knife or a plurality of staples, wherein the knife isconfigured to cut the tissue, and wherein the plurality of staples areconfigured to fasten the tissue.

Example 51

The surgical instrument of Example 50, wherein the cartridge includeseach of the knife and the plurality of staples.

Example 52

The surgical instrument of any one or more of Examples 41 through 51,wherein the distal end portion of the end effector includes an anvil,and the guide pin is configured to inhibit deflection of the anvilrelative to the proximal end portion.

Example 53

The surgical instrument of any one or more of Examples 41 through 52,wherein the guide pin is a rigid guide pin.

Example 54

An end effector of a surgical instrument for manipulating tissue of apatient with a cartridge, comprising: (a) a distal end portion; (b) aproximal end portion; (c) a gap between the distal end portion and theproximal end portion; and (d) a guide pin extending from the distal endportion to the proximal portion, wherein the guide pin is configured toreceive the tissue thereagainst for positioning the tissue within thegap, wherein the guide pin is connected to each of the distal andproximal end portions to secure the distal end portion relative to theproximal end portion and inhibit deflection of the distal end portionrelative to the proximal end portion.

Example 55

The surgical instrument of Example 54, wherein the distal end portionextends distally from the proximal end portion in the form of ahook-shape supporting structure with the gap therebetween configured toreceive the tissue.

Example 56

The surgical instrument of any one or more of Examples 54 through 55,wherein the guide pin is connected to each of the distal and proximalend portions in tension to secure the distal end portion relative to theproximal end portion.

Example 57

The surgical instrument of any one or more of Examples 54 through 56,wherein the guide pin is in the form of a threaded fastener.

Example 58

The surgical instrument of any one or more of Examples 54 through 57,further comprising a cartridge received against the guide pin, whereinthe cartridge is configured to be guided from the proximal end portiontoward the distal end portion along the guide pin.

Example 59

A method of manipulating tissue of a patient with a surgical instrument,the surgical instrument including a body having a firing mechanismconfigured to be selectively manipulated by an operator, a shaftassembly extending distally from the body, and an end effector extendingdistally from the shaft assembly and configured to receive a cartridgefor manipulating the tissue of the patient, wherein the end effector hasa distal end portion, a proximal end portion, a gap between the distaland proximal end portions, and a guide pin extending from the distal endportion to the proximal end portion, wherein the guide pin is configuredto receive the tissue thereagainst for positioning the tissue within thegap, wherein the guide pin is connected to each of the distal andproximal end portions to secure the distal end portion relative to theproximal end portion and inhibit deflection of the distal end portionrelative to the proximal end portion, the method comprising: (a)receiving the tissue of the patient within the gap between the distaland proximal end portions of the end effector; (b) positioning thetissue against the guide pin; (c) inhibiting deflection of the distalend portion of the end effector relative to the proximal end portion ofthe end effector with the guide pin; and (d) manipulating the firingmechanism to thereby manipulate the tissue of the patient.

Example 60

The method of Example 59, further comprising increasing tension in theguide pin such that guide pin further inhibits deflection of the distalend portion of the end effector relative to the proximal end portion ofthe end effector.

Example 61

A surgical instrument comprising: (a) an end effector receiving acartridge, the cartridge including at least one of a knife and aplurality of staples and configured to actuate from an unfired cartridgeposition to a fired cartridge position, wherein the knife is configuredto cut tissue when actuated from the unfired cartridge position to thefired cartridge position and the plurality of staples are configured tofasten the tissue when actuated from the unfired cartridge position tothe fired cartridge position; (b) a shaft assembly connected to the endeffector such that the end effector extends distally from the shaftassembly; and (c) a handle assembly connected to the shaft assembly suchthat the shaft assembly extends distally from the handle assembly, thehandle assembly, including: (i) a handle housing, (ii) a firing memberconfigured to selectively actuate from a first position to a secondposition as a firing stroke, wherein the firing member is operativelyconnected to the cartridge via the shaft assembly such that the firingmember is configured to actuate the cartridge from the unfired cartridgeposition to the fired cartridge position when the firing member isactuated through the firing stroke, and (iii) a feedback generatoroperatively connected to the firing member and configured to communicatean audible sound and a visual indicia to an operator indicative of thefiring member completing the firing stroke for actuating the cartridgeto the fired cartridge position.

Example 62

The surgical instrument of Example 61, wherein the feedback generatorfurther includes: (A) a sound generator mounted within the handlehousing and configured to generate the audible sound, and (B) a feedbackassembly movably mounted within the handle housing proximate to thesound generator and configured to be driven from an unfired feedbackposition to a fired feedback position, wherein the feedback assemblyincludes the visual indicia thereon, and wherein the feedback assemblyis configured to strike the sound generator thereby generating theaudible sound as the feedback assembly is driven from the unfiredfeedback position to the fired feedback position via the firing memberactuating the firing stroke.

Example 63

The surgical instrument of Example 62, wherein the firing memberincludes a catch element, wherein the catch element is configured toengage the feedback assembly as the firing member actuates from thefirst position to the second position and thereby drive the feedbackassembly from the unfired feedback position to the fired feedbackposition.

Example 64

The surgical instrument of any one or more of Examples 62 through 63,wherein the feedback assembly further includes a sled slidably mountedwithin the handle assembly and configured to be translatably driven fromthe unfired feedback position to the fired feedback position.

Example 65

The surgical instrument of Example 64, wherein the feedback assemblyfurther includes a linkage coupling pivotally mounted within the handleassembly and pivotally connected to the sled, wherein the linkagecoupling is configured to be engaged by the firing member actuating fromthe first position to the second position and pull the sled from theunfired feedback position to the fired feedback position, wherein afirst distance between the unfired feedback position and the firedfeedback position is greater than a second distance between the firstposition and the second position such that the linkage member isconfigured to magnify movement of the sled for improving resolution ofthe visual indicia to the operator.

Example 66

The surgical instrument of any one or more of Examples 62 through 65,further wherein the sound generator further comprises a feedback tabconfigured to be plucked and cause the sound generator to resonate theaudible sound, wherein the feedback assembly further comprises a pick,wherein the pick is configured to pluck the feedback tab as the feedbackassembly is driven from the unfired feedback position to the firedfeedback position.

Example 67

The surgical instrument of any one or more of Examples 62 through 66,further comprising an indicia window extending through the handlehousing and aligned with the visual indicia such that the visual indiciais visible through the indicia window.

Example 68

The surgical instrument of Example 67, wherein the visual indiciaincludes an unfired visual indicia and a fired visual indicia, whereinthe unfired visual indicia is configured to align with the indiciawindow in the unfired feedback position such that the unfired visualindicia is visible through the indicia window and configured tocommunicate to the operator that the cartridge is in the unfiredcartridge position prior to the firing stroke of the firing member, andwherein the fired visual indicia is configured to align with the indiciawindow in the unfired feedback position such that the unfired visualindicia is visible through the indicia window and configured tocommunicate to the operator that the cartridge is in the fired cartridgeposition after the firing stroke of the firing member.

Example 69

The surgical instrument of any one or more of Examples 62 through 68,wherein the sound generator further comprises a feedback tab configuredto be plucked and cause the sound generator to resonate the audiblesound, wherein the feedback assembly further comprises a pick extendingtherefrom, wherein the pick is configured to pluck the feedback tab asthe feedback assembly is driven from the unfired feedback position tothe fired feedback position.

Example 70

The surgical instrument of Example 62, wherein the feedback assemblyfurther includes: (A) a feedback member having the unfired visualindicia and the fired visual indicia thereon and a pick extendingtherefrom, wherein the pick is configured to strike the sound generatoras the feedback assembly is driven from the unfired feedback position tothe fired feedback position, and (B) a sled slidably mounted within thehandle assembly and configured to be translatably driven from theunfired feedback position to the fired feedback position, and whereinthe feedback member is adjustably mounted to the sled assembly such thatthe position of the feedback member relative to the handle housing isconfigured to be calibrated to the firing member completing the firingstroke.

Example 71

The surgical instrument of any one or more of Examples 61 through 70,wherein the feedback generator is configured to simultaneouslycommunicate the audible sound and the visual indicia to the operator.

Example 72

The surgical instrument of Example 61, wherein the visual indicia ispositioned on the firing member, the surgical instrument furthercomprising an indicia window extending through the handle housing andaligned with the visual indicia such that the visual indicia is visiblethrough the indicia window.

Example 73

The surgical instrument of Example 61, wherein the feedback generatorincludes a resilient clip, a ramp, and a drum surface, wherein theresilient clip extends from the firing member and is configured to movewith the firing member from an unfired feedback position to a firedfeedback position, wherein the ramp is positioned such that theresilient clip is configured to engage the ramp and resiliently bend asthe resilient clip moves from the unfired feedback position toward thefired feedback position, and wherein the drum surface is positioned suchthat the resilient clip is configured to snap from the ramp to the drumsurface in the fired position and generate the audible soundtherebetween.

Example 74

The surgical instrument of Example 61, the feedback generator having awheel rotatably mounted within the handle housing, wherein the wheelincludes the visual indicia thereon, and wherein the firing member isconfigured to rotate the firing member from an unfired feedback positionto a fired feedback position, the surgical instrument further comprisingan indicia window extending through the handle housing and aligned withthe visual indicia such that the visual indicia is visible through theindicia window.

Example 75

The surgical instrument of Example 61, further comprising: (a) a firstraised bump operatively connected to the firing member; and (b) a secondraised bump positioned proximate to the first raised bump, wherein theat first raised bump is configured to grind against the second raisedbump and generate the audible sound and a tactile feedback.

Example 76

A surgical instrument comprising: (a) an end effector configured tooperatively support a cartridge configured to move from a firedcartridge position to an unfired cartridge position; (b) a shaftassembly connected to the end effector such that the end effectorextends distally from the shaft assembly; and (c) a handle assemblyconnected to the shaft assembly such that the shaft assembly extendsdistally from the handle assembly, the handle assembly, including: (i) ahandle housing, (ii) a firing member configured to selectively actuatefrom a first position to a second position as a firing stroke, whereinthe firing member is operatively connected to the cartridge via theshaft assembly such that the firing member is configured to actuate thecartridge from the unfired cartridge position to the fired cartridgeposition, and (iii) a feedback generator operatively connected to thefiring member and configured to communicate an audible sound and avisual indicia to an operator indicative of the firing member completingthe firing stroke for actuating the cartridge to the fired cartridgeposition.

Example 77

The surgical instrument of Example 76, wherein the feedback generatorfurther includes: (A) a sound generator mounted within the handlehousing and configured to generate the audible sound, and (B) a feedbackassembly movably mounted within the handle housing proximate to thesound generator and configured to be driven from an unfired feedbackposition to a fired feedback position, wherein the feedback assemblyincludes the visual indicia thereon, and wherein the feedback assemblyis configured to strike the sound generator thereby generating theaudible sound as the feedback assembly is driven from the unfiredfeedback position to the fired feedback position via the firing memberactuating the firing stroke.

Example 78

The surgical instrument of Example 77, wherein the sound generatorcomprises a feedback tab configured to be plucked and cause the soundgenerator to resonate the audible sound, wherein the feedback assemblycomprises a pick extending therefrom, wherein the pick is configured topluck the feedback tab as the feedback assembly is driven from theunfired feedback position to the fired feedback position.

Example 79

The surgical instrument of any one or more of Examples 77 through 78,further comprising an indicia window extending through the handlehousing and aligned with the visual indicia such that the visual indiciais visible through the indicia window.

Example 80

A method of indicating that a cartridge of a surgical staplinginstrument has been fired from an unfired position to a fired position,the method comprising: (a) selectively actuating a firing member afiring stroke from a first position to a second position; (b) actuatinga cartridge from an unfired cartridge position to a fired cartridgeposition via selective actuation of the firing member to the secondposition; (c) simultaneously generating an audible sound and a visualindicia when the firing member completes the firing stroke to indicatefiring of the cartridge to the fired position; and (d) at least one ofsevering tissue of a patient or fastening the tissue of the patient uponfiring the cartridge to the fired position.

Example 81

A surgical instrument comprising: (a) a body having a firing mechanismconfigured to be selectively manipulated by an operator; (b) a shaftassembly extending distally from the body; (c) an end effector extendingdistally from the shaft assembly, the end effector including an anvil;and (d) a cartridge received within the end effector opposite the anviland operatively connected to the firing mechanism, the cartridgeincluding: (i) a cartridge housing having a plurality of staple slots,(ii) a plurality of staples respectively positioned within the pluralityof staple slots, and (iii) a driver assembly having a plurality ofdrivers respectively supporting the plurality of staples thereon withinthe plurality of staple slots, wherein the firing mechanism isconfigured to selectively move the plurality of drivers distally towardthe anvil for forming the plurality of staples therebetween, wherein atleast one driver of the plurality of drivers has a variable distalheight relative to at least another driver of the plurality of driversin a predetermined variable height pattern.

Example 82

The surgical instrument of Example 81, wherein the predeterminedvariable height pattern of the plurality of drivers is configured touniformly form the plurality of staples between the anvil and the driverassembly thereby accommodating deflection of the end effector.

Example 83

The surgical instrument of Example 81, wherein the predeterminedvariable height pattern of the plurality of drivers is configured tonon-uniformly form the plurality of staples between the anvil and thedriver assembly.

Example 84

The surgical instrument of any one or more of Examples 81 through 83,wherein the plurality of drivers includes a first row of drivers and asecond row of drivers arranged in the predetermined variable heightpattern, and wherein predetermined variable height pattern tapers downfrom the second row of drivers toward the first row of drivers.

Example 85

The surgical instrument of Example 84, wherein the first row of drivershas a first uniform distal height, wherein the second row of drivers hasa second uniform distal height, and wherein the first uniform distalheight is less than the second uniform distal height.

Example 86

The surgical instrument of Example 84, wherein the driver assembly has aknife slot configured to receive a knife therethrough, and the first andsecond rows of drivers are arranged on one side of the knife slot,wherein the plurality of drivers includes a third row of drivers and afourth row of drivers arranged in the predetermined variable heightpattern on another side of the knife slot, wherein the predeterminedvariable height pattern tapers down from the fourth row of driverstoward the third row of drivers.

Example 87

The surgical instrument of Example 86, wherein the first row of drivershas a first uniform distal height, wherein the second row of drivers hasa second uniform distal height, wherein the first uniform distal heightis less than the second uniform distal height, wherein the third row ofdrivers has a third uniform distal height, the fourth row of drivers hasa fourth uniform distal height, and wherein the third uniform distalheight is less than the fourth uniform distal height.

Example 88

The surgical instrument of Example 87, wherein the second uniform distalheight is less than the third uniform distal height.

Example 89

The surgical instrument of any one or more of Examples 81 through 83,wherein the plurality of drivers includes a first row of driversarranged in the predetermined variable height pattern from a first endto a second end and a middle therebetween, wherein the predeterminedvariable height pattern tapers down from the respective first and secondends toward the middle.

Example 90

The surgical instrument of Example 89, wherein the plurality of driversincludes a second row of drivers arranged in the predetermined variableheight pattern from the first end to the second end and the middletherebetween, wherein the predetermined variable height pattern tapersdown from the second row of drivers toward the first row of drivers.

Example 91

The surgical instrument of Example 90, wherein the driver assembly has aknife slot configured to receive a knife therethrough and the first andsecond rows of drivers are arranged on one side of the knife slot,wherein the plurality of drivers includes a third row of drivers and afourth row of drivers arranged in the predetermined variable heightpattern on another side of the knife slot from the first end to thesecond end and the middle therebetween, and wherein the predeterminedvariable height pattern tapers down from the fourth row of driverstoward the third row of drivers.

Example 92

The surgical instrument of any one or more of Examples 81 through 83,wherein the plurality of drivers includes a first row of driversarranged in the predetermined variable height pattern from a first endto a second end and a middle therebetween, wherein the predeterminedvariable height pattern of the first row of drivers tapers down from therespective first end toward the middle and is generally uniform from themiddle toward the second end.

Example 93

The surgical instrument of Example 92, wherein the plurality of driversincludes a second row of drivers arranged in the predetermined variableheight pattern from the first end to the second end and a middletherebetween, and wherein the predetermined variable height pattern ofthe second row of drivers tapers down from the first end toward themiddle and is generally uniform from the middle toward the second end.

Example 94

The surgical instrument of Example 93, wherein the first and second rowsof drivers are identical.

Example 95

The surgical instrument of any one or more of Examples 93 through 94,wherein the driver assembly has a knife slot configured to receive aknife therethrough and the first and second rows of drivers are arrangedon one side of the knife slot, wherein the plurality of drivers includesa third row of drivers and a fourth row of drivers arranged in thepredetermined variable height pattern on another side of the knife slotfrom the first end to the second end and the middle therebetween, andwherein the predetermined variable height pattern of the third andfourth rows of drivers tapers down from the respective first end towardthe middle and is generally uniform from the middle toward the secondend.

Example 96

The surgical instrument of Example 95, wherein the first, second, third,and fourth rows of drivers are identical.

Example 97

A cartridge received in a surgical instrument, the cartridge comprising:(a) a cartridge housing having a plurality of staple slots; (b) aplurality of staples respectively positioned within the plurality ofstaple slots; and (c) a driver assembly having a plurality of driversrespectively supporting the plurality of staples thereon within theplurality of staple slots, wherein at least one driver of the pluralityof drivers has a variable distal height relative to at least anotherdriver of the plurality of drivers in a predetermined variable heightpattern.

Example 98

A method of forming a plurality of staples in a tissue of a patient witha surgical instrument, the surgical instrument including a body have afiring mechanism configured to be selectively manipulated by anoperator, a shaft assembly extending distally from the body, and acartridge received within the end effector opposite the anvil andoperatively connected to the firing mechanism, the cartridge having acartridge housing with a plurality of staple slots, a plurality ofstaples respectively position within the plurality of staple slots, anda driver assembly with a plurality of drivers respectively supportingthe plurality of staples thereon within the plurality of staple slots,wherein the firing mechanism is configured to selectively move theplurality of drivers distally toward the anvil for forming the staplestherebetween, wherein at least one driver of the plurality of drivershas a variable distal height relative to at least another driver of theplurality of drivers in a predetermined variable height pattern, themethod comprising: (a) selectively manipulating the firing mechanism anddirecting the plurality of drivers with the respective plurality ofstaples toward the anvil in the predetermined variable height pattern;(b) pressing the plurality of staples between the driver assembly andanvil; and (c) forming the plurality of staples within the tissue of thepatient and thereby fluidly sealing the tissue along the formedplurality of staples therewith.

Example 99

The method of Example 98, further comprising deflecting a portion of theend effector with the anvil relative to the plurality of drivers apredetermined deflection such that the predetermined variable heightpattern accommodates the predetermined deflection, and wherein formingthe plurality of staples further includes uniformly forming theplurality of staples within the tissue.

Example 100

The method of Example 98, wherein forming the plurality of staplesfurther includes non-uniformly forming the plurality of staples withinthe tissue.

Example 101

A surgical instrument comprising: (a) a body having a firing mechanismconfigured to be manipulated by an operator; (b) a shaft assemblyextending distally from the body; and (c) an end effector operativelyconnected to the firing mechanism via the shaft assembly, wherein theend effector is configured to receive a cartridge selectively actuatedby the selective manipulation of the firing mechanism, wherein a distalend portion of the end effector includes: (i) a first end; (ii) a secondend laterally opposite from the first end; (iii) a distal crestlaterally positioned between the first and second ends, wherein thedistal crest projects distally beyond the first and second ends; and(iv) an arcuate distal surface extending along the distal crest andlaterally between the first and second ends, wherein the arcuate distalsurface at the distal crest has a radius of curvature configured to bereceived against a pelvic bowl of a patient to position the end effectorrelative to colon tissue of the patient for manipulating the colontissue with the cartridge.

Example 102

The surgical instrument of Example 101, wherein the distal crestprojects distally from the first and second ends with the radius ofcurvature being between approximately 1.5 inches and approximately 3inches for being received against the pelvic bowl.

Example 103

The surgical instrument of any one or more of Examples 101 through 102,wherein the distal crest projects distally from each of the first andsecond ends with the radius of curvature is approximately 2 inches forbeing received against the pelvic bowl.

Example 104

The surgical instrument of any one or more of Examples 101 through 103,wherein the radius of curvature along the arcuate distal surface fromthe first end to the second end varies with a compound curvature thatincludes the radius of curvature of the distal crest of approximately 2inches for being received against the pelvic bowl.

Example 105

The surgical instrument of any one or more of Examples 101 through 104,wherein the distal crest is positioned laterally approximately midwaybetween the first and second ends.

Example 106

The surgical instrument of any one or more of Examples 101 through 105,wherein radius of curvature of the arcuate distal surface extendslaterally from the first end to the second end.

Example 107

The surgical instrument of any one or more of Examples 101 through 106,wherein the first end is in the form of a first half-dome extending tothe distal arcuate surface, wherein the second end is in the form of asecond half-dome extending to the distal arcuate surface.

Example 108

The surgical instrument of Example 107, wherein the first and secondhalf-domes have the radius of curvature.

Example 109

The surgical instrument of any one or more of Examples 101 through 108,wherein the distal end portion of the end effector is laterally C-shapedfrom the first end to the second end.

Example 110

The surgical instrument of Example 109, wherein the C-shaped distal endportion of the end effector has an inner radius of curvature of betweenapproximately 1.0 inch and 1.2 inches and an outer radius of curvatureof between approximately 1.3 inches and approximately 1.6 inches.

Example 111

The surgical instrument of Example 110, wherein the inner radiuscurvature is approximately 1.1 inches and the outer radius of curvatureis approximately 1.5 inches.

Example 112

The surgical instrument of any one or more of Examples 101 through 111,wherein the distal arcuate surface extends continuously from the firstend to the second end.

Example 113

The surgical instrument of Example 112, wherein the distal arcuatesurface extends smoothly from the first end to the second end.

Example 114

The surgical instrument of any one or more of Examples 101 through 113,further comprising a cartridge configured to be received within the endeffector, wherein the cartridge includes at least one of a knife or aplurality of staples, wherein the knife is configured to sever tissue,and wherein the plurality of staples are configured to fasten tissue.

Example 115

The surgical instrument of Example 114, wherein the distal end portionof the end effector is laterally C-shaped from the first end to thesecond end.

Example 116

The surgical instrument of any one or more of Examples 114 through 115,wherein the distal crest is positioned laterally midway between thefirst and second ends.

Example 117

The surgical instrument of any one or more of Examples 114 through 116,wherein the distal arcuate surface extends continuously from the firstend to the second end.

Example 118

The surgical instrument of any one or more of Examples 114 through 117,wherein radius of curvature of the arcuate distal surface extendslaterally from the first end to the second end.

Example 119

The surgical instrument of any one or more of Examples 114 through 118,wherein the first end is a first half-dome extending to the distalarcuate surface, and the second end is a second half-dome extending tothe distal arcuate surface.

Example 120

A method of manipulating colon tissue of a patient with a surgicalinstrument, the surgical instrument including a body having a firingmechanism configured to be manipulated by an operator, a shaft assemblyextending distally from the body, and an end effector operativelyconnected to the firing mechanism via the shaft assembly, wherein theend effector is configured to receive a cartridge selectively actuatedby the selective manipulation of the firing mechanism, wherein thedistal end portion of the end effector includes a first end, a secondend laterally opposite from the first end, a distal crest, and anarcuate distal surface, the distal crest laterally positioned betweenthe first and second ends, wherein the distal crest projects distallybeyond the first and second ends, wherein the arcuate distal surfaceextends along the distal crest and laterally between the first andsecond ends, and wherein the arcuate distal surface at the distal cresthas a radius of curvature configured to be received against a pelvicbowl of the patient to position the end effector relative to the colontissue of the patient for manipulating the colon tissue with thecartridge, the method comprising: (a) inserting the end effector withinthe pelvic bowl of the patient; (b) positioning the arcuate distalsurface of the distal end portion of the end effector against the pelvicbowl such that the end effector is in a predetermined orientationrelative to the colon tissue thereby positioning the cartridge relativeto the colon tissue, wherein the arcuate distal surface and the distalcrest complement a curvature of tissue in the pelvic bowl that the endeffector is positioned against; and (c) receiving the colon tissuewithin the end effector; and (d) actuating the end effector to therebystaple and sever the tissue with the end effector.

V. Miscellaneous

It should be understood that any one or more of the teachings,expressions, embodiments, examples, etc. described herein may becombined with any one or more of the other teachings, expressions,embodiments, examples, etc. that are described herein. Theabove-described teachings, expressions, embodiments, examples, etc.should therefore not be viewed in isolation relative to each other.Various suitable ways in which the teachings herein may be combined willbe readily apparent to those of ordinary skill in the art in view of theteachings herein. Such modifications and variations are intended to beincluded within the scope of the claims.

It should be appreciated that any patent, publication, or otherdisclosure material, in whole or in part, that is said to beincorporated by reference herein is incorporated herein only to theextent that the incorporated material does not conflict with existingdefinitions, statements, or other disclosure material set forth in thisdisclosure. As such, and to the extent necessary, the disclosure asexplicitly set forth herein supersedes any conflicting materialincorporated herein by reference. Any material, or portion thereof, thatis said to be incorporated by reference herein, but which conflicts withexisting definitions, statements, or other disclosure material set forthherein will only be incorporated to the extent that no conflict arisesbetween that incorporated material and the existing disclosure material.

The surgical instrument systems described herein have been described inconnection with the deployment and deformation of staples; however, theembodiments described herein are not so limited. Various embodiments areenvisioned which deploy fasteners other than staples, such as clamps ortacks, for example. Moreover, various embodiments are envisioned whichutilize any suitable means for sealing tissue. For instance, an endeffector in accordance with various embodiments can comprise electrodesconfigured to heat and seal the tissue. Also, for instance, an endeffector in accordance with certain embodiments can apply vibrationalenergy to seal the tissue.

Versions of the devices described above may be designed to be disposedof after a single use, or they can be designed to be used multipletimes. Versions may, in either or both cases, be reconditioned for reuseafter at least one use. Reconditioning may include any combination ofthe steps of disassembly of the device, followed by cleaning orreplacement of particular pieces, and subsequent reassembly. Inparticular, some versions of the device may be disassembled, and anynumber of the particular pieces or parts of the device may beselectively replaced or removed in any combination. Upon cleaning and/orreplacement of particular parts, some versions of the device may bereassembled for subsequent use either at a reconditioning facility, orby an operator immediately prior to a procedure. Those skilled in theart will appreciate that reconditioning of a device may utilize avariety of techniques for disassembly, cleaning/replacement, andreassembly. Use of such techniques, and the resulting reconditioneddevice, are all within the scope of the present application.

By way of example only, versions described herein may be sterilizedbefore and/or after a procedure. In one sterilization technique, thedevice is placed in a closed and sealed container, such as a plastic orTYVEK bag. The container and device may then be placed in a field ofradiation that can penetrate the container, such as gamma radiation,x-rays, or high-energy electrons. The radiation may kill bacteria on thedevice and in the container. The sterilized device may then be stored inthe sterile container for later use. A device may also be sterilizedusing any other technique known in the art, including but not limited tobeta or gamma radiation, ethylene oxide, or steam.

The entire disclosures of: U.S. Pat. No. 5,403,312, entitled“Electrosurgical Hemostatic Device,” which issued on Apr. 4, 1995; U.S.Pat. No. 7,000,818, entitled “Surgical Stapling Instrument havingSeparate Distinct Closing and Firing Systems,” which issued on Feb. 21,2006; U.S. Pat. No. 7,422,139, entitled “Motor-Driven Surgical Cuttingand Fastening Instrument with Tactile Position Feedback,” which issuedon Sep. 9, 2008; U.S. Pat. No. 7,464,849, entitled “Electro-MechanicalSurgical Instrument with Closure System and Anvil Alignment Components,”which issued on Dec. 16, 2008; U.S. Pat. No. 7,670,334, entitled“Surgical Instrument Having An Articulating End Effector,” which issuedon Mar. 2, 2010; U.S. Pat. No. 7,753,245, entitled “Surgical StaplingInstruments,” which issued on Jul. 13, 2010 U.S. Pat. No. 8,393,514,entitled “Selectively Orientable Implantable Fastener Cartridge,” whichissued on Mar. 12, 2013 U.S. patent application Ser. No. 11/343,803,entitled “Surgical Instrument Having Recording Capabilities;” now U.S.Pat. No. 7,845,537; U.S. patent application Ser. No. 12/031,573,entitled “Surgical Cutting And Fastening Instrument Having RFElectrodes,” filed Feb. 14, 2008; U.S. patent application Ser. No.12/031,873, entitled “End Effectors For A Surgical Cutting And StaplingInstrument,” filed Feb. 15, 2008, now U.S. Pat. No. 7,980,443; U.S.patent application Ser. No. 12/235,782, entitled “Motor-Driven SurgicalCutting Instrument,” now U.S. Pat. No. 8,210,411; U.S. patentapplication Ser. No. 12/249,117, entitled “Powered Surgical Cutting AndStapling Apparatus With Manually Retractable Firing System,” now U.S.Pat. No. 8,608,045; U.S. patent application Ser. No. 12/647,100,entitled “Motor-Driven Surgical Cutting Instrument with ElectricActuator Directional Control Assembly,” filed Dec. 24, 2009; now U.S.Pat. No. 8,220,688; U.S. patent application Ser. No. 12/893,461,entitled “Staple Cartridge,” filed Sep. 29, 2012, now U.S. Pat. No.8,733,613; U.S. patent application Ser. No. 13/036,647, entitled“Surgical Stapling Instrument,” filed Feb. 28, 2011, now U.S. Pat. No.8,561,870; U.S. patent application Ser. No. 13/118,241, entitled“Surgical Stapling Instruments With Rotatable Staple DeploymentArrangements,” now U.S. Pat. No. 9,072,535; U.S. patent application Ser.No. 13/524,049, entitled “Articulatable Surgical Instrument Comprising AFiring Drive,” filed on Jun. 15, 2012; now U.S. Pat. No. 9,101,358; U.S.patent application Ser. No. 13/800,025, entitled “Staple CartridgeTissue Thickness Sensor System,” filed on Mar. 13, 2013, now U.S. Pat.No. 9,345,481; U.S. patent application Ser. No. 13/800,067, entitled“Staple Cartridge Tissue Thickness Sensor System,” filed on Mar. 13,2013, now U.S. Patent Application Publication No. 2014/0263552; U.S.Patent Application Publication No. 2007/0175955, entitled “SurgicalCutting And Fastening Instrument With Closure Trigger LockingMechanism,” filed Jan. 31, 2006; and U.S. Patent Application PublicationNo. 2010/0264194, entitled “Surgical Stapling Instrument With AnArticulatable End Effector,” filed Apr. 22, 2010, now U.S. Pat. No.8,308,040, are hereby incorporated by reference herein.

Having shown and described various embodiments of the present invention,further adaptations of the methods and systems described herein may beaccomplished by appropriate modifications by one of ordinary skill inthe art without departing from the scope of the present invention.Several of such potential modifications have been mentioned, and otherswill be apparent to those skilled in the art. For instance, theexamples, embodiments, geometrics, materials, dimensions, ratios, steps,and the like discussed above are illustrative and are not required.Accordingly, the scope of the present invention should be considered interms of the following claims and is understood not to be limited to thedetails of structure and operation shown and described in thespecification and drawings.

We claim:
 1. A method of using an instrument to manipulate tissue of apatient, wherein the instrument has an end effector, the methodcomprising: (a) positioning the tissue within a gap between a cartridgeand an anvil of the end effector, wherein the cartridge includes a knifeand a plurality of staples, wherein the anvil is located in a distal endportion of the end effector, and wherein the end effector is in an openconfiguration during the act of positioning the tissue between the anviland the cartridge; (b) positioning the tissue against a guide pin tolaterally position the tissue relative to the cartridge and the anvil,(c) moving a retaining pin from an open position toward a closedposition across the gap, thereby capturing the tissue between thecartridge, the anvil, the guide pin, and the retaining pin; (d) movingthe cartridge toward the anvil such that the end effector is in a closedconfiguration; (e) inhibiting deflection of the distal end portion ofthe end effector for aligning the cartridge and the anvil, wherein atleast one of the guide pin or the retaining pin connects to the distalend portion secure the distal end portion relative to a proximal endportion of the end effector to thereby inhibit deflection of the distalend portion of the end effector; (f) forming the plurality of stapleswithin the tissue and fluidly sealing the tissue; (g) sliding the knifedistally toward the tissue such that the knife directs the retaining pinto lock to the distal end portion in a locked closed position; and (h)cutting the tissue with the knife, thereby severing the tissue.
 2. Themethod of claim 1, wherein inhibiting deflection is provided by theguide pin connected to the distal end portion and the proximal endportion to secure the distal end portion relative to the proximal endportion of the end effector.
 3. The method of claim 2, furthercomprising increasing tension in the guide pin such that guide pinfurther inhibits deflection of the distal end portion of the endeffector relative to the proximal end portion of the end effector. 4.The method of claim 1, wherein inhibiting deflection is provided by theretaining pin connected to the distal end portion and the proximal endportion to secure the distal end portion relative to the proximal endportion of the end effector.
 5. The method of claim 4, wherein thedistal end portion includes a first ledge, the retaining pin includes asecond ledge, and the method further comprises overlapping the secondledge with the first ledge to lock the retaining pin in the lockedclosed position.
 6. The method of claim 5, wherein locking the retainingpin further includes expanding a portion of the retaining pin within thedistal end portion of the end effector.
 7. The method of claim 6,wherein expanding a portion of the retaining pin further includessliding the knife toward the anvil such that the knife forces theportion of the retaining pin to expand.
 8. The method of claim 6,wherein expanding a portion of the retaining pin further includessliding a closure rod through the retaining pin toward the distal endportion such that the closure rod forces the portion of the retainingpin to expand.
 9. The method of claim 5, wherein the end effectorincludes a cam mechanism having a cam tab and a cam slot, and the methodfurther comprises guiding the cam tab through the cam slot and rotatingthe retaining pin therewith to the locked closed position.
 10. Themethod of claim 9, wherein the guide pin is rotatably supported in asupport cradle, and the method further comprises translating the supportcradle and the retaining pin toward the distal end portion.
 11. Themethod of claim 4, wherein the distal end portion includes a firstplurality of threads, the retaining pin includes a second plurality ofthreads, and the method further comprises threading the second pluralityof threads with the first plurality of threads to lock the retaining pinin the locked closed position.
 12. The method of claim 11, wherein theend effector includes a cam mechanism having a cam tab and a spiral camslot, and the method further comprises guiding the cam tab through thespiral cam slot and rotating the retaining pin therewith to the lockedclosed position.
 13. The method of claim 1, wherein the end effector isoperatively attached to a body having a firing member configured toselectively actuate a firing stroke and move the cartridge from anunfired cartridge position to a fired cartridge position for forming theplurality of staples and cutting the tissue, wherein the method furthercomprises simultaneously communicating an audible sound and a visualindicia with a feedback generator to the operator to indicate that thefiring member completed the firing stroke for actuating the cartridge tothe fired cartridge position.
 14. The method of claim 1, wherein thetissue is a colon tissue, and the method further comprises performing alower anterior resection of the colon tissue.
 15. The method of claim14, wherein the distal end portion of the end effector includes, a firstend, a second end laterally opposite from the first end, a distal crestlaterally positioned between the first and second ends, wherein thedistal crest projects distally beyond the first and second ends; and anarcuate distal surface extending along the distal crest and laterallybetween the first and second ends, wherein the arcuate distal surface atthe distal crest has a radius of curvature configured to be receivedagainst a pelvic bowl of the patient to position the end effectorrelative to the colon tissue of the patient for manipulating the colontissue with the cartridge, wherein the method further comprisespositioning the arcuate distal surface of the distal end portion of theend effector against the pelvic bowl such that the end effector is in apredetermined orientation relative to the colon tissue therebypositioning the cartridge relative to the colon tissue for performingthe lower anterior resection of the colon tissue.
 16. The method ofclaim 1, wherein the distal end portion of the end effector has a distalarcuate continuous surface.
 17. A method of using an instrument tomanipulate tissue of a patient, wherein the instrument has an endeffector, the method comprising: (a) positioning the tissue within a gapbetween a cartridge and an anvil of the end effector, wherein thecartridge includes a knife and a plurality of staples, wherein the anvilis located in a distal end portion of the end effector, and wherein theend effector is in an open configuration during the act of positioningthe tissue between the anvil and the cartridge; (b) positioning thetissue against a guide pin to laterally position the tissue relative tothe cartridge and the anvil, (c) moving a retaining pin from an openposition toward a closed position across the gap, thereby capturing thetissue between the cartridge, the anvil, the guide pin, and theretaining pin; (d) moving the cartridge toward the anvil such that theend effector is in a closed configuration; (e) inhibiting deflection ofthe distal end portion of the end effector for aligning the cartridgeand the anvil, wherein at least one of the guide pin or the retainingpin connects to the distal end portion to secure the distal end portionrelative to a proximal end portion of the end effector to therebyinhibit deflection of the distal end portion of the end effector; (f)forming the plurality of staples within the tissue and fluidly sealingthe tissue; and (g) cutting the tissue with the knife, thereby severingthe tissue, wherein the cartridge includes a driver assembly and aplurality of staple slots, wherein the driver assembly has a pluralityof drivers respectively supporting the plurality of staples thereonwithin the plurality of staple slots, wherein at least one driver of theplurality of drivers has a variable distal height relative to at leastanother driver of the plurality of drivers in a predetermined variableheight pattern, and the method further comprises directing the pluralityof drivers with the respective plurality of staples toward the anvil inthe predetermined variable height pattern.
 18. The method of claim 17,further comprising deflecting the distal end portion of end effectorwith the anvil relative to the plurality of drivers a predetermineddeflection such that the predetermined variable height patternaccommodates the predetermined deflection, and wherein forming theplurality of staples further includes uniformly forming the plurality ofstaples within the tissue.
 19. The method of claim 17, wherein formingthe plurality of staples further includes non-uniformly forming theplurality of staples within the tissue.
 20. A method of using aninstrument to manipulate colon tissue of a patient, wherein theinstrument has an end effector with a distal end portion having a distalarcuate continuous surface, the method comprising: (a) engaging thedistal arcuate continuous surface of the distal end portion against apelvic bowl to stabilize the end effector within the pelvic bowl andalign the end effector relative to the colon tissue in a predeterminedorientation; (b) positioning the colon tissue within a gap between acartridge and an anvil of an end effector, wherein the cartridgeincludes a knife and a plurality of staples, wherein the anvil isreceived within the distal end portion of the end effector, and whereinthe end effector is in an open configuration during the act ofpositioning the colon tissue between the anvil and the cartridge; (c)positioning the colon tissue against a guide pin, (d) moving a retainingpin from an open position toward a closed position across the gap,thereby capturing the colon tissue between the cartridge, the anvil, theguide pin, and the retaining pin; (e) moving the cartridge toward theanvil such that the end effector is in a closed configuration; (f)inhibiting deflection of the distal end portion of the end effector foraligning the cartridge and the anvil, wherein at least one of the guidepin and the retaining pin connects to the distal end portion to securethe distal end portion relative to a proximal end portion of the endeffector; (g) forming the plurality of staples within the colon tissueand fluidly sealing the colon tissue; and (h) cutting the colon tissuewith the knife, thereby providing a lower anterior resection of thecolon tissue.